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  1. Written by Laura Jane Burgess There’s excited chatter on the mat, the rustle of nylon fabric being packed, the buzzing hustle and bustle of a busy day. Canopies zip overhead. Squinting, mesmerized, though you’ve seen it near a hundred times, you watch the initial glide across the grass, the slide of flat-soled swoopers, and the quick-legged staccato steps as each jumper comes to a stop. You’ve never seen a more perfect day to skydive. Waiver signed you file in line behind a queue of shuffling feet and exasperated sighs—a 15-person traffic jam. Daylight’s burning. Loads should be turning. What’s the holdup? It’s the fellow at the front. A jumper far from his home drop zone (558.9 miles, ± .1 mile to be exact). His innocent intent was to check in and manifest. Except, he doesn’t have so much as a shred of physical documentation to his name. No logbook to verify currency and no physical, tangible evidence of USPA credentials. What’s to be done? His lack of documentation dismissed or ignored? Certainly not. Exhaustive, time-consuming attempts made to secure a paper trail. Undoubtedly. If everyone’s lucky, the ordeal will take 10-20 minutes. However, if you consider that at a busy drop zone you’re likely to encounter the same issue any number of times on any given day. The wasted daylight adds up, cutting into profit margins and the amount of time jumpers spend in the air. Imagine for a moment that the futile task of trying to sleuth down credentials could be avoided, and the check-in process could be made significantly easier—for everyone involved. As luck would have it, this is precisely what the Sigma / Burble integration aims to do. In the late spring of 2019, when the integration launches, skydivers who frequent any one of the many drop zones utilizing Burble software can grant those drop zones access to view their Merits on Sigma. In case you’ve been ignoring those emails the USPA sent you or still feel a little in the dark, Merits aren’t patches to be stitched on a Cub Scout sash. Rather, Merits refer to things like USPA credentials, UPT ratings, corresponding coursework and even your most recently completed skydives. At the close of the day, drop zones taking advantage of the newly integrated systems can send out shareable Merits for completed jumps, whether it be to tandems, fun jumpers, or staff. For jumpers, the Merits can serve as a “digital signature” to verify their most recent skydive. Instead of relying on illegible, potentially forged, physical logbook entries, there will be a traceable, authenticated digital entry. Drop zones can also attach video clips and other media to the merit badges. This creates hefty possibilities for Merit use with student training programs. No matter where a student roams (or if their logbook follows suit), instructors at any Burble drop zone can see exactly who and what they are working with. For jumpers, the integration process requires no real technical finesse. In around three minutes, skydivers can link their Sigma account to their BurbleMe profile. Jumpers can then authorize the Burble drop zone(s) of their choice access to their Sigma Merits. Every time they check in at the preferred Burble drop zone(s), their Merit information auto-populates into their jumper profile. The result? A streamlined shortcut from check-in to freefall. The first time a jumper grants a Burble drop zone access to view their Sigma Merits, they can enable an auto-update feature. From thenceforth, whenever changes to Merits occur, it automatically uploads into the drop zone’s Burble DZM Account and the jumper’s BurbleMe profile. Practically applied, this looks like convenient, real-time access to see as credentials expire, are renewed, or are updated, without the need to request additional physical documentation. After the Sigma / Burble integration, drop zones can have instant access to verified information without having to waste time or manpower on multiple sources. After the integration takes effect, staff will no longer need to manually input jumper information or search the USPA database with the Group Member lookup tool. Fewer steps and less manual data transfer mean less opportunity for error. The instant access to verified, up-to-date information, makes it much easier for drop zones to verify the standing of visiting jumpers and instructors in a shorter amount of time. For DZO’s, in particular, this integration offers untold peace of mind: no more worrying about the legitimacy of jumpers on your aircraft, fears of forgery, concerns over invalid credentials, or issues with input errors. Come spring 2019, you might catch the audible sigh of relief coming from the staff buried underneath the mountain of (soon to be obsolete) paperwork, see the sheer joy of jumpers spending less time at check-in and more time on airplanes, and agree, with the Sigma / Burble integration, t here’s something for everyone to celebrate! Featured image credit: SkydiveTV Vimeo
  2. admin

    Tandem Skydiving

    What Is Tandem Skydiving? Tandem skydiving is an extremely popular form of skydiving and an excellent introduction into the sport, it allows one to experience the adrenaline and excitement without having to commit excessively to the activity at hand. While AFF training and static-line jumping consists of hours of training prior to the jump, going tandem only requires around 30 minutes of ground preparation prior. The reason for this is that while both AFF and static-line skydives require you to learn how to control your canopy and establish a deep knowledge of maintaining specific body positions in free fall, with tandem skydiving you only need to know the basics about how you should position your body relative to your tandem master. The fact that your tandem instructor will be responsible for your chute leaves you with the ability to spend more of your effort focusing on the sheer excitement of the jump, as opposed to what procedure who'll be doing next. You, the tandem student, will be strapped to a tandem instructor by use of a secure harness system which makes use of a shoulder strap on either side, a chest strap which secures across your chest, as well as leg straps. You will be strapped onto the chest, or front side of the tandem master, so you can be sure that you'll have the best view in the house. While tandem jumps are most common as once off introductions to skydiving, they are also sometimes used in conjunction with training courses, specifically in the early stages of a course. Using tandem jumping in training methods when you want to learn how to skydive can be extremely effective as it allows the student to experience both freefall and canopy flight without the feeling of being thrown into the deep end, so to speak. There are also students who look to perform several tandem skydives prior to their training course in order to familiarize themselves with the environment. A tandem freefall generally lasts between 45 and 60 seconds, followed by a four minute canopy ride to the ground. Where To Start? For starters, you want to make sure that you are going to be skydiving at a drop zone that has a good reputation. There are over a thousand drop zones around the world and each offer a different experience, some good and some poor. Dropzone.com has been developed around helping you to find the best drop zone in the area of your choice, and providing you with user ratings and reviews to help you make your decision. Look for drop zones with large volumes of positive reviews, and take the time to read through them and see what issues other users may have experienced at any particular drop zone. Unlike static-line progression for example, tandem skydiving is done at almost every drop zone, so you should be fine in that area, but be sure to check and make sure. When comparing drop zones it's vital to make sure you that you understand what you will be receiving with your jump. A tandem skydive can take place between altitudes of anywhere from 10 000 to 14 000ft, if free fall time is of importance to you it's certainly worth querying this topic with the drop zone. Another important question is, if you're paying a lot for your jump, are they offering you the best services for the amount you're paying? Does your jump include video footage or still photography, most have this as an extra cost - so be sure to check what the drop zone is charging for their video services. And if it does offer video services, is this filmed from a mounted camera attached to the tandem instructor or are they pulling out all the stops and having a separate photographer joining the jump solely to take some quality photographs of your jump. These are all aspects which should be examined and considered when you're scouting for the best drop zone in your area. Once you've located a drop zone near to your destination, give them a call or send them an e-mail, they should be more than willing to address any questions you may have about your jump and guide you through the booking process, setting you up with a date to jump. Some Advice To Consider Before Making Your Tandem Jump While you're likely to be walked through the correct dos and don'ts during your pre-jump ground briefing, it doesn't hurt to prepare prior to the day for what you should be doing and what you shouldn't be doing for your jump. Remove jewelry and accessories prior to Tandem Skydiving. At 120mph, it begins very easy for loose jewelry or accessories to come loose during free fall and get lost. It's a good idea to leave the jewelry at home on the day of your jump. Remove piercings, specifically nipple rings. When the canopy is opened during flight, your chest strap will pull against you, and there have been cases where people have had nipple rings pulled when this occurs - learn from their mistakes. Remember that there are also harness straps around your legs, so be sure to remove all piercings that may be impacted. Removing all piercings leave less gambling for something getting snagged, but nipple and surface piercings are definitely best removed. Tie up your hair. Whether you're male or female, if you have long hair it is a wise idea to tie it up in a manner that makes it least likely to get caught in the harness at any stage - and also remain out of the TIs face. Tucking it into the helmet once tied is also not a bad idea. Stick close to your tandem instructor. Once you're leaving the manifest for your jump, be sure to remain close to your tandem instructor. Always listen to your tandem instructor. They are the ones that know best, despite what you think you know - as an inexperienced tandem skydiver, your tandem instructor should not be questioned when it comes to anything related to the procedure of, or the jump itself. Be respectful and polite. While you may be frustrated at things like weather holds, it's important to remain calm and realize that these events are often out of the control of the instructors and the manifest staff. Image by Lukasz Szymanski Tandem Instructors The tandem instructors or tandem masters are going to be the ones in control of your skydive. The fact that the tandem instructor has control over the safety of the jump has prompted strict rules and regulations, especially within the United States, as to who can lead a tandem jump. The current requirements set in place go a long way in providing peace of mind that you're going to be in excellent hands when in the air. Before a skydiver is able to be the tandem instructor on a jump, he has to go through several procedures. First he has to be an experienced skydiver with a minimum of 500 jumps and 3 years of skydiving experience to his name, secondly he must possess a 'master parachute license' which has to be issued by an FAA-recognized organization, such as the USPA (United States Parachute Association). Furthermore, they are required to undergo training and acquire a certification related to the canopy they are going to be flying. On top of these requirements, the USPA has a few more of their own. Up until late 2008 in the United States, one was able to either be a tandem master with a manufacturer's rating or a tandem instructor which required the USPA training, though this was changed and now requires all those leading tandem jumps in the United States to hold a tandem instructors rating. The details of the ratings systems and the requirements vary between countries. One thing that separates the best drop zones from a bad drop zone for those doing a tandem jump, is the attitude and behavior of their tandem instructor. Luckily, if you've done your research and found yourself a good drop zone, this shouldn't be a worry and you may well end up making a new friend in the process. A good instructor is one that is able to answer any questions you have, while at the same time making you feel comfortable and relaxed. The best instructors find a perfect balance between safety and professionalism and humor, after all the jump is pointless if you don't enjoy yourself. Should I Be Nervous About Tandem Skydiving? It's completely normal to feel nervous about skydiving, even those of us who seek adrenalin constantly have some level of nervousness at times. Jumping out of a perfectly good plane, whether it is while experiencing a tandem jump or even the thrill of wing suiting, is not something natural to us as humans, and you can be sure that you're not alone in what you feel. With that said though, as with many areas where what you're facing is foreign and unknown, your fear often tends to turn to excitement once you're in it. I have seen a countless number of first time tandem skydivers being a bit unsure in the beginning but once their feet touch the ground their mind set changes completely. These are often people performing a bucket list jump with no intention of ever skydiving again, but after they've experience the feeling of free fall, they are hooked - and often end up booking their AFF courses to become a licensed skydiver just a few days later. Tandem skydiving has an excellent safety record for most parts of the world and you can take comfort in the fact that according to the United States Parachute Association, around half a million people each year choose to tandem skydive in the US alone. How Much Does A Tandem Jump Cost? The price of tandem skydives vary between drop zones, generally you're looking in the price range of about $120 to in excess of $300. This cost can either include or exclude the cost of things like a camera man and a video copy of your skydive. We highly recommend that you look into the prices and the specifications at each drop zone. For more information read below... Things To Know About Tandems There are typically restrictions on age when it comes to performing a tandem jump, the exact age varies depending on country and drop zone. The typical requirement from most drop zones is 18, though some drop zones do allow for 16 to 18 year olds to perform a tandem jump as long as they have parental consent. It is best to speak to your local drop zone about their age policies. When booking a tandem skydive it's important to know what to expect, often once off tandem jumpers go in without knowing what a skydive entails, how drop zones operate and what to expect. Understand that skydiving hinges on the weather conditions, when the winds are too strong or it's too cloudy, or if there's fog - you may well find yourself on the end of a weather hold. This is an aspect of skydiving that no one is free from, and the experienced jumpers get just as disappointed when they don't get to head out. Weather holds can last anywhere from 5 minutes to 5 days, depending on the conditions. Because of this it's best to plan your skydive around your local weather, if you're in an area with lots of summer tropical rainfall - it may be best to book in the autumn or winter months when rainfall is less likely, otherwise booking for an earlier time in the day before daytime heating causes the development of thunder showers. In areas of winter rainfall, summer is obviously your best bet, though nothing can ever be guaranteed. There are areas where weather holds are rare, and if you're in one of these areas that sees little annual rainfall, you're likely to see your jump happen without any hassles. It's highly recommended that you discuss deposits and payments with the drop zones prior to booking. While most DZs will gladly discuss openly and honestly with you their rules and restrictions in regards to deposits and refunds, many fail to bring up this topic prior to finalizing their booking and they end up upset when they find out that there is no refund issued for deposits on jumps that are postponed due to weather holds. How Safe is Tandem Skydiving? A common question asked by those intrigued by the idea of a tandem jump, is whether or not it is safe. And just how safe it truly is. We've long tracked fatalities in our database and can help in easing some of the anxiety you may have around tandem skydiving safety. The reality is that as with any high risk sport, there is the potential for death, though with that said - tandem skydivers remain the least likely to suffer at the hands of a fatality than other jumpers. Between the years 2005 and 2019 there were less than 100 tandem fatalities, with our records pointing closer to around 60. In that same time frame, our records indicate a total of just more than 700 fatalities, meaning that less than 1 out of 10 skydiving fatalities were tied to tandem skydiving. The important thing to remember is also that tandem skydives are extremely popular and on average there are an estimated 250,000 tandem jumps performed each year in the United States. So while calling tandem jumps safe may be a bit of a subjective statement, the truth is there are a number of aspects of your daily life that hold more risk than completing a tandem jump. The Technical Side And Skydiving Gear There are a few things you should remember when you are looking at the more technical side of your skydiving gear. Skydiving canopies are designed specifically for certain disciplines of skydiving, for speed and immediate response smaller canopies are used - such as those designed for swooping, these smaller canopies are also more dangerous, allowing for less margin of error. For tandem skydiving, where safety takes priority, the canopies (parachutes) used are much larger than those that you find in swooping for example. This is both because the canopy is going to need to carry twice the regular skydiving weight and because of the desired gentle nature of the canopy flight. The rig that is used by your tandem instructor is set up so that it will provide optimum safety for you on your jump. The rig contains an AAD (automatic activation device) which is a safety device that is designed to automatically fire the main chute after a skydiver descends past a certain altitude and has not yet fired the main canopy. There is also the special tandem canopy, which will be the parachute that is deployed during freefall, also known as the main. There is also a reserve canopy, this is a backup that exists in case of a failure on the main, an example would be, if a main canopy opens with a line twist and one is not able to recover from it - the main would be cut and the reserve deployed. These are packed into what is known as the container, the backpack looking item on the back of the tandem instructor. The instructor will also be carrying an altimeter on him, usually around the wrist, which can provide visual or audio information on the progression of the descent, so that he can release the main canopy at the correct time. During free fall, you can expect to reach speeds of up to 120mph (180km/h). Once you've done your skydive, remember to come back to dropzone.com and let us know what you thought of your experience, by rating the drop zone you jumped at. Safety and Training Forum Find a place to jump in your area.
  3. StarLog Skydiving & Rigging Logbooks Price: $12 Brand new line of Skydiver and Rigger Logbooks. All spiral bound for easy logging and fit inside all standard size logbook covers. StarLog Skydiver holds 304 jumps StarLog Pro holds 1456 jumps StarLog Rigger holds 684 logs Available at ChutingStar Power Tools Price: $19.95 Want a great stocking stuffer with a low price? Give your loved one a Power Tool packing tool in holiday colors! Available at Para-Gear Hanging Handcrafted Wood Swooper Dude Price: $20 Made of mahogany, coconut and jute, the details on this handcrafted swooper includes a canopy, lines, rig on the back, hair, determined swoop face and skirt. Available at ChutingStar Rig Hangers Price: $42 With these colorful hangers you can hang your skydiving rig wherever you want. Whether it's on a rack at the dropzone hangar, on the back of a door, in your closet or anywhere else you can think of. These powder coated hangers make it easy to spot your skydiving rig, as well as give it a nice accent. Available at Para-Gear The Summer I Became A Skydiver, Children's Book Price: $25 Skydiver Ben Lowe wrote this children's book that tell's the story of a boy's introduction into a summer of skydiving. This 29-page hardcover book is a great short story that also helps explain skydiving to youngsters. Available at ChutingStar Glow Face Alt III Galaxy - $169 Meters and Black Only. The phosphorescent face provides a background glow to assist in low light conditions. The glow lasts over 2 hours in complete darkness, and is perfect for either night jumps or those sunset loads when it starts to get dark. The Glow Face Altimaster III Galaxy features a field replaceable lens. In case your lens gets scratched or cracked you will now be able to replace it yourself instead of having to send it to get serviced. Available at Para-Gear Selections Skydiving Photo Book by Michael McGowan Price: $43 This giant, hardcover photo book from McGowan is the perfect coffee table book of some of the most amazing shots in skydiving. Packed with more than 100 large, full-page photographs. Includes forward by Michael McGowan as well as liner notes from Angie McGowan and Tom Sanders. Available at ChutingStar Para-Gear Parachute Gear Bag Price: $85 Durable fabric and heavy duty zippers make this bag ideal for storing and carrying all the gear needed for skydiving. ID sleeve for personal information Dual zippered main compartment with zip protector Back pocket with additional inner zippered-pocket for storing accessories and documents up to size A4 Rubber handle on top and side Heavy duty metal buckles and comfortable-shoulder straps Durable, easy to clean, splash proof material. Available at Para-Gear
  4. Para Gear is interested in photographic submissions that you may have for the 2019 - 2020 Para Gear Catalog #82. We have taken the time to briefly describe the format and certain criteria that we look for, in order to help you to see if you have something worth submitting. We have included examples of previous catalog covers for your reference. http://www.facebook.com/media/set/?set=a.290693934285998.71336.290673160954742&type=3 or http://www.dropzone.com/photos/zArchive/Article_Photos/Para_Gear_Covers/index.html Over the years Para Gear has used photos from all of skydiving's disciplines. We do not have a preference as far as what type of skydiving photo it is, rather we look for something that either is eye-catching or pleasing to the eye. In light of the digital age, we are also able to use photos that in one way or another may be less than perfect and enhance them, removing blemishes, flipping images, altering colors, etc. Front cover of catalog 81 Back cover of catalog 81 The following are preferences. However what we prefer and what we get, or choose, are not always the same. If however we came down to a choice between two photos of equal quality, we would opt for the one that met more of our preferences. We typically prefer that the photo be brighter. In the past we have used sunset photos and even a night jump photo, although by and large most of the photos are daytime. We like the subject of the image to have contrast with the background. Subjects that are wearing brighter more colorful clothing usually stand out more. We prefer to have the people in the photo wearing equipment since that is what we sell. Headgear, goggles, jumpsuits, altimeters, audible altimeters, and gloves are all good. We also prefer to see skydivers wearing head and foot protection. We do not print any BASE jumping nor any Tandem photographs. No submissions of these will be accepted. We are not interested an any photos of individual or groups of skydivers standing on the ground. Front cover 2016 Back cover 2016 Our basic criteria is as follows:Vertical Format. The front and back covers of the catalog are both in a vertical format. We can use a horizontal (landscape) shot, as opposed to a vertical (portrait), and then crop it as long as the image lies within a vertical cropping. Photo Quality. The front and back cover shots will be printed as 8 ½ x 11 in 300 dpi format. Any film that can hold its quality up to this size and print dpi is fine. Digital format is preferred. In the event of a final cover choice, we prefer to be sent the original digital image or slide for getting the best quality out of the image. Back Cover Photo. The back cover photo is no different from the front except in one respect. We need to have room on the left side of the image for the thumb index. In the past we have taken images and been able to horizontally flip them thereby creating this room. Originality. Anything that is original, eye-catching, or makes someone take more notice of the catalog covers is something we look for. It could be a photo from a unique camera position or angle, a scenic skydive, shots under canopy, landings, etc. We look for photos that have not been previously published and most likely would not accept them if they have, as we want a photo that no one else has seen yet. We also do not want any photos that are chosen as the front or back covers to be used for other non Para Gear advertising for a period of one year. Para Gear offers $500.00 each for both the front and back covers we choose. Our current deadline for catalog cover submissions is November 16th 2018. Sending sample pictures by e-mail to [email protected], If you are sending sample digital pictures please note that they do not need to be in a very large format. If we like the sample picture we will then ask you to send the higher quality original. Please feel free to contact me directly with any questions.
  5. New video captures two freefall enthusiasts from Siberia break world record by 'skydiving' indoors for more than 8.5 hours. The longest indoor freefall Guinness World Record has been jointly achieved by two Russian adventurers, Viktor Kozlov and Sergey Dmitriyev, in the city of Perm on Tuesday, 10 July 2018. The record took place at the innovative FreeFly Technology wind tunnel. The skydivers flew uninterrupted for 8 hours, 33 minutes and 43 seconds to beat the record of indoor freefall set before. The result was made official by a representative of the Guinness World Records Association. Each minute of indoor body-flying is the equivalent of one skydive, and the whole 513 minutes is the same as falling 1280 miles continuously or the distance from New York to Cuba. This unprecedented record has been captured in a short video produced by the FreeFLy Technology team. About Freefly TechnologyFreeFly Technology is an international technological company producing innovative wind tunnels for recreational and entertainment purposes. It comprises more than 30 people responsible for design, production and sales of wind tunnels. Comprehensive understanding of aerodynamics and needs of the target customers make FreeFly Technology uniquely capable of designing and manufacturing cost-effective wind tunnels, which outperform the analogues available on the market. About The Wind TunnelFreeFly Technology wind tunnel is built on a technology allowing the air to move upwards at approximately 270 km/h (167 mph or 75 m/s), the terminal velocity of a falling human body bellydownwards. It can provide the wind speeds and the feel of real skydiving. Such kind of vertical wind tunnels are frequently called “indoor skydiving” tunnels due to their popularity among skydivers, who report that the sensation is extremely similar to skydiving. WEBSITE - www.freeflytechnology.net/ FACEBOOK - www.facebook.com/freefly.technology INSTAGRAM - www.instagram.com/freefly_technology/
  6. Issue Date: 19 April 2018 Bulletin Number: PSB-01-2018 Subject: Firmware Update and High Altitude Jumps Status: Mandatory Prior to the next jump with any aircraft altitude exceeding 27,000 ft MSL Identification: All Sport Vigil II and Vigil 2+ with firmware versions 05.05, 05.06, 06.01, 06.02 This product service bulletin does not apply to Military Vigils Background: Due to an internal calculation algorithm, units with firmware versions 05.05, 05.06, 06.01, 06.02 will enter protected CTRL-ERR mode when the measured pressure is less than 300 hpa. (Approximately 30,000 ft MSL). Compliance: Vigil II & Vigil 2+ (does not apply to Military Vigils). All Vigil II and 2+ units with firmware versions 05.05, 05.06, 06.01, 06.02 MUST be updated to a new firmware version. The current firmware version MUST be checked in the info menu during the startup of the Vigil. (See Road Map - Parameter Sequence Flow Chart in the User's Manual). Compliance Date: Compliance is the mandatory before any jump during which the aircraft is anticipated to reach, or reaches, any altitude above 27,000 ft MSL. DO NOT MAKE ANY JUMP IF THE AIRCRAFT, AT ANY TIME ON THE FLIGHT, EXCEEDS 27,000 ft MSL WITHOUT HAVING FIRST FULLY COMPILED WITH THIS PSB. For all users NOT making, or planning to make a jump with an exit altitude above 27,000 ft MSL, or planning to make a flight above 27,000 ft MSL, compliance is still mandatory for all affected firmware versions, however compliance may be at the user's convenience during any repack between the date of this PSB and 31 May 2020. This is to prevent risk of possible future high altitude use by a new owner or user, without compliance with, or awareness of this service bulletin. Compliance Procedure and Costs: Please follow the return RMA procedure online at https://www.vigil.aero/servicingThe unit update, maintenance and return shipping from AAD Belgium or Vigil America to the customer will be at no charge to the customer.The shipping cost to AAD Belgium or to Vigil America will be the customer's responsibility.Repack costs and expenses are solely the customer's responsibility. No claims for repack costs and expenses will be accepted.Authority: Jo Smolders Managing Director A.A.D. nv/sa Bd.A. Reysers, 193 1030 Brussels - Belgium - Europe Tel: +32.2.732.65.52 Fax: +32.2.736.06.27 www.vigil.aero - [email protected] Vigil America, Inc. 1400 Flightline Blvd., Suite C Deland, FL 32724 Tel: +1.386.736.8464 Fax: +1.386.736.8468 www.vigil.aero - [email protected] Distribution of this Advisory Product Service Bulletin shall include, but is not limited to: All AAD dealers.Parachute Industry Association.All identified parachuting publications.All identified parachuting Federations and Associations.All National Aero Clubs, Parachuting Section.IPC Technical Committee
  7. Courtesy Apex BASE: Pascal Constantineau flying his FLiK at Skydive Perris during his BASE canopy course with Dimitrije Dadic. (Of note: Square1 offers discounted rental rigs to people taking Dimitrije’s BASE canopy courses.) If you’re like most people, your idea of dropzone training for the stresses of the BASE environment involves trying to look nonchalant when you climb into a hot-air balloon basket. If you have no access to such a thing (and/or if you’re significantly smarter than the average bear) you’re probably looking for more. You know you need a way to get as many jumps under your belt as possible with your BASE parachute proudly overhead--preferably, with a reserve on standby. But how? “Skydiving your BASE canopy is by far the best way to learn canopy skills for BASE jumping before making a BASE jump,” says Steve Doherty, who served as Director of Operations of Apex BASE for five years. “In a perfect world, everyone would be able to jump their BASE canopy skydiving--a lot--before they ever took it out on a BASE jump.” Ideally, if you’re serious about this, you’re not just swapping gear willy-nilly on every dropzone day. You have a dedicated skydiving system, configured for the purpose. Here’s how to build it. The Canopy“It's only with the introduction of ultralight canopies that jumping BASE canopies at the dropzone has become a possible and useful activity,” he continues. “Anything you can use in the BASE environment, you can use in the skydiving environment--of course, in the skydiving environment, you have to manage your opening speed.” “If you take your whole BASE setup: mesh slider, BASE bridle and BASE pilot chute, you're going to have a very brisk skydiving opening,” he adds. “In our collective experience at Apex, we found that you can make two or three slider-up skydives on this kind of setup in a day and it's okay. If you were going to make five to ten, you need to start making modifications.” As any seasoned BASE jumper will tell you, nothing flies quite like an actual BASE canopy--so the goal is to get as close to it as possible. Athletes who want to train BASE canopy skills should choose an ultralight canopy and seek a skydiving container that fits it. That said: Athletes who want to get into flying a wingsuit with the intention of BASE jumping but don’t want to jump a BASE-sized canopy for all their wingsuit skydiving training now have some options.“On today’s market, you can find seven-cell, BASE-type canopies created for the skydiving environment. The benefit is that--while these canopies do have some of the distinctive BASE properties--you can jump all day and not feel it when you wake up the next morning. The RisersForward-facing risers are more appropriate in the skydiving environment for a simple reason: the possibility of a horseshoe malfunction. During a horseshoe malfunction, forward-facing risers are the only type that you can reliably cut away. “During a horseshoe malfunction with rear-facing risers,” Doherty notes, “Your body will be in the way of the twisting movement that the three-rings need to do in order to release. So, when you’re jumping a two-parachute system, we always recommend jumping forward-facing risers.” The ContainerAs you’ve certainly noticed by now: Apart from student gear, most of the containers available for sport use won't fit BASE canopies. According to Apex, the best way around that is to jump an ultra-light parachute. (Take, for instance, the Lobo: a 250 can pack up to the size of a skydiving 180.) “More and more drop zones are coming around to the idea of BASE jumping,” Doherty continues, “That is to say: Not assuming that it’s attracting bad publicity to the sport of skydiving. Nowadays, they're more willing to let their student gear be used. Here in Southern California, we suggest going to Square One. They have a huge selection of demo equipment, so it’s relatively easy to get the largest demo container they have and pack into it the largest BASE canopy that fits.” Most drop zones have a container that's sized for a 180/200. The Apex team have, however, not been able to find a non-tandem or -military container able to fit anything bigger than a 300+ made from F-111 fabric. (UltraLite PN-9 is a different story, and large canopies are more easily accommodated.) The D-BagTalk to your local CReW dogs: You don't have to use a deployment bag when you skydive. “You can free-pack your BASE canopy into a properly-sized skydiving container, just like you do in your BASE container,” he says, “except the rectangle is a lot smaller, so you’ll have to stack it up.” If that sounds a little unnerving, ask for help. Doherty notes that a lot of the older generations of CReW skydivers are quite familiar with that deployment method, so ask them for advice. If you do use a D-bag, he insists that you’re using it correctly. Take note of what BASE canopy you're using. Not all BASE manufacturers use a metal ring at the top of the parachute. Some do use a metal ring, just like you'd find on a skydiving canopy. The Blackjack and Ace canopies built by Asylum also use a metal ring. Atair doesn't. And Apex doesn’t, either. To get this right, use a metal connect link to prevent the canopy from getting sucked up into the grommet of the bag. (Very importantly, the link needs to be inside the bag.) The Pilot ChuteYou are going to want to use a slightly larger pilot chute for a BASE canopy than you would if you were jumping a skydiving canopy, because the BASE canopy itself is much larger. “You don't need to use the same-sized pilot chute that you use in the BASE environment,” Doherty notes, “We recommend a 32" non-collapsible pilot chute for skydiving. It's much larger than a sky pilot chute, which is typically 28 inches.” The Bridle“We typically use a longer bridle in BASE jumping,” Doherty says. “You don't need to take the BASE bridle over to make the BASE canopy work. You'd want to use the bridle that was appropriate for whatever discipline you were doing in skydiving. We recommend using a normal skydiving bridle for normal skydiving freefalls. If you’re wingsuiting, we recommend using whatever bridle length you'd normally use for wingsuiting in the BASE environment.” The SliderYou can use a mesh slider, but it’s not ideal. “In BASE, we’re so close to the ground that we tolerate--even welcome--brisk openings,” Doherty says. “But if you make five jumps on a mesh slider at terminal, you’re going to feel it. You won’t regret using a sail slider in the skydiving environment. That said: If you’re making hop-and-pops, a mesh slider is not a problem.” The JumpsOnce you’re all geared up, there’s only one place to go: Up. And when you get there, you’ll have a few more things to think about. “When you're jumping a BASE canopy on the dropzone, you have to think about where you're going to be in the pattern,” Doherty advises. “You're jumping a parachute that's much larger than the other parachutes around you and you're going to descend a lot slower. Especially at large dropzones where they’re flying multiple aircraft and doing multiple load drops over the same area, this can get problematic. Stay out of the way.” The MentalityIf you have access to a candy-colored, fire-powered dead-air machine, then by all means use it--but don’t rely on them as the sole training platform for your BASE-jumping skills. Commit to fine-tuning your BASE canopy skills (and that impossible-to-exaggerate-the-importance-of accuracy) before and between jumps from objects. Your bones, your friends and your family will thank you. And--as always--talk to your mentor and/or gear manufacturer to clarify any points that leave you unclear.
  8. admin

    How Green Is My Skydive

    by Bryan Burke Images by Serge ShakutoFriends, co-workers, and visitors to Skydive Arizona often comment on my interest in environmental topics and my rather restrained consumption of goods and energy, at least by American standards. This is in sharp contrast to my job, which is helping to run the biggest drop zone on the planet. I freely confess I have probably pumped more jet fuel into jump planes than anyone on earth. My fuel supplier is on speed dial and I order 8,000 gallons of jet fuel with a 15 second phone call. When things are busy I make that call two or three times a week. National Championships or Holiday Boogie busy? Every other day. Yet we strive to keep our operations as efficient as possible. This is good business: burn less fuel, save money. Over time, every incremental gain in efficiency saves a few gallons of fuel here and there, just as people who plan their weekly driving to minimize miles and maximize efficiency will see huge savings over time, in thousands of small increments. I reconcile my environmental leanings with my job in this manner: if someone else was doing it, a lot more fuel would be wasted. On a busy day I figure my expertise and commitment to efficiency saves Skydive Arizona at least two Otter loads worth of fuel consumption. Just how much does our sport consume, and how does that compare to other ways oil is used or wasted? The numbers that follow are rough - sometimes very rough. Comparisons are difficult because as numbers get bigger and bigger, they tend to get harder to evaluate for accuracy. Even rough numbers will give the curious reader something to think about. A Twin Otter burns about 30 gallons of jet fuel per load. If a drop zone operates at high efficiency, meaning most loads are close to full, that works out to about 1.4 to 1.5 gallons per jumper through the door. Other jump aircraft can be assumed to come in somewhere near that figure. A Cessna 182 burns a lot less per load in volume, but in terms of jumpers per load and time flown, they aren’t that different. Single engine turbines are probably about as efficient as it gets. But on the other hand, if you lose an engine on an Otter, you’re still in an airplane. If you lose the engine on a PAC or Caravan, you’re in a glider. That’s the main reason Skydive Arizona likes to run twin engine jump ships. Gasoline turns into Carbon Dioxide at a rate of about one gallon into 20 pounds. Jet fuel is a little less clean, coming in at 21 pounds per gallon. Therefore, for every 100 jumps you make, about 140 gallons of fuel are burned, and 2,940 pounds of carbon dioxide are emitted. That’s one and a half tons. Does your log book suddenly feel heavier? If you are having trouble wrapping your head around this figure, think about the raw energy involved in getting to altitude for a skydive. Imagine climbing 13,000 feet on foot, say from the lowlands around Mt. Rainier to the summit, which is 14,411 feet above sea level. Skydive Arizona is 1,500 feet above sea level, so when your altimeter says 13,000 on jump run, you’re at about the same height as the summit of Mt. Rainier. It would take several days, lots of meals, and enormous effort to get to that summit on foot. We do it in 15 minutes using a jump plane. How? By turning long dead plants and animals into explosive energy funneled through a turbine engine. By USPA’s figures, approximately 3 million jumps per year were made in the USA between 2007 and 2016, which works out to 4,200,000 gallons of fuel and 88,200,000 pounds of CO2. That’s 44,100 tons of CO2 emitted by skydiving in America each year. Multiply that by ten years and we’re talking about a lot of emissions! Let’s look even further back. Based on the jump estimates published in the April 2013 edition of Parachutist, annual jump numbers were at or below 2,000,000 until the late 80s, then climbed steadily throughout the 90s to their current levels. This makes sense. Prior to 1990, turbine aircraft were few, equipment less reliable and “one size fits all,” and training less sophisticated. People packed their own rigs. The pace was just a lot slower. Improvements in all these areas allowed the sport to reach out to a much broader demographic, resulting in more jumps made. Driven by curiosity I started pulling numbers off USPA’s bar graph estimating number of jumps per year through 2013 and then added on through 2016. I made my best rounding-off estimate, coming up with about 70 million jumps in the history of US skydiving through 2016. Obviously as data gets harder to read, or scarcer, numbers get fuzzier. Rough numbers suggest that about half of all jumps made in the world take place in the USA, so globally the skydiving total might come to about 140 million jumps made in the entire history of the sport. That would mean that since 1960, the sport has burned through somewhere around 196,000,000 gallons of fuel, sending about 2,058,000 tons of CO2 out the exhaust pipes. How do we stack up against other fuel figures?The State of California estimates that 26,221,917 gallons per year are burned by Off Highway Vehicles, including motorcycles, ATVs, and snowmobiles. That’s almost six times the total national fuel consumption for skydiving. Put another way, OHV recreation in California alone burns more than twice as much fuel as the entire world’s skydiving. The Department of Defense is the world’s single largest buyer of fossil fuels, with an estimated consumption as high as 14 million gallons per day. That’s more than all skydivers in the world use in a year and a half. To fly Air Force 1 to Hawaii and back is about 50,000 gallons of fuel, or about 36,000 jumps – enough fuel to run a mid-sized seasonal drop zone for a year. So much for motorized comparisons. Let’s look at some other fossil fuel uses. In my home state of Arizona coal-generated electrical power produced 33,402,462 tons of CO2 in the year 2016. In just one year, that works out to 16 times the entire skydiving fuel burn, globally, in all of history. The Earth Policy Institute estimates that America’s bottled water demand requires 714,000,000 gallons of oil annually for materials, packing, storage, transport, and cooling. That works out to more than 80 years of jumps for the entire skydiving world at current levels of jumping. In a more graphic image, the Pacific Institute says each bottle of drinking water would have to be filled about ¼ of the way up with oil to represent the energy it used! A gallon is 3.8 liters (which makes one jump about 5.3 liters, don’t you love math?) so you only need to drink about twenty-one 1-liter bottles of water or other beverages to waste as much oil as one skydive. Of course, this doesn’t count the energy used to get you to the DZ and make your rig, jumpsuit, and accessory equipment. Or make the airplane, pave the runway, and put up the hangar. Then comes the most disheartening element of fuel of all, the waste. The Exxon Valdez spill released about 11,000,000 gallons of fuel over the space of a few days, enough to supply the entire global fleet of jump ships with fuel to fly for over a year. Exxon Valdez pales compared to the ten largest spills in history, all of which amounted to more than 45 million gallons each. The Deepwater Horizon spill alone was estimated to be approximately 200 million gallons, which would cover all the skydives ever made in the world, with about 30 million gallons left over for rigs and jumpsuits, and shipping them to customers. Here’s my favorite. Around three billion gallons of gasoline are estimated to be wasted annually in the USA by cars idled in traffic congestion. If that amount was used for skydiving, the entire world could keep jumping at current levels for another 350 years. Daily fuel wasted in American traffic jams is the equivalent of almost six million jumps, or an entire year of the entire world’s estimated skydives. I didn’t bring up all these very dark comparisons to make skydiving look green against a black background. There’s just no way we can rationalize skydiving into being green. To visualize just how much CO2 you generate on each jump, take that 29.4 pounds of CO2 and visualize it as six five-pound bags of charcoal briquets. Every jump, piling up on the DZ. If a bag of briquets is about one cubic foot, even a small drop zone would have a big pile out back. Skydive Arizona would have enough to fill four structures the size of the Colosseum of Rome, plus one Parthenon. On the other hand, clearly skydiving is a small element of the whole picture. At the personal level, if you are the average American your annual car emissions are the equivalent of 340 skydives per year. Even so, how can it be justified? Philosophically, I do it this way. Play is a fundamental need coming in right after food, water, shelter, and security. Skydiving is high quality play, as good as it gets, but it comes with a cost. We can’t eliminate that cost, but we can mitigate it by simply focusing on eliminating waste and inefficiency throughout our society and off-setting the damage through environmental restoration. Wasteful use of oil, such as bottled water, cars stuck in traffic, industrial scale agriculture, consumer culture in general, and incredibly fuel consumptive military adventures around the globe are examples of where savings could be had. These require some personal and political commitment to steer away from a system that practically glorifies waste. Why not take that lesson skydiving with you? Maybe carpool to the DZ with a friend. Take an apartment closer to your job to avoid that wasteful commute or use mass transit to get to work. Buy a couple re-useable five-gallon water jugs to fill at a local water filtration facility, then refill smaller bottles from that rather than buying a pack of one-liter bottles for the weekend at the DZ. Set your air conditioning a little higher in summer and a little lower in winter. Make your driving as purposeful and efficient as possible by planning your errands carefully and buying a car that is practical rather than a statement about image. Buy less stuff. Not only does stuff need to be moved from source to consumer, it must be mined, refined, transported to manufacturing plants, and so on. An I-phone 5S has a carbon footprint of 150 pounds - five skydives worth of fuel. I find that visualization really helps me make immediate choices. If you visualize the bottom quarter of that throw-way beverage bottle as filled with bitter jet fuel that you must drink, you’ll never want to touch it again. Sodas, same way. All that high fructose corn syrup was grown on highly mechanized farms before it was heated, treated, dyed, stuffed into a plastic bottle, and trucked to its air-conditioned home in a machine! When I contemplate a road trip, I visualize chucking a five-pound bag of charcoal out of my window every five miles and ask myself just how important that trip is to me. It’s harder to hide from the truth this way. I’ll still make the trip, but I allow myself only so much total annual fuel consumption – a budget, if you will – and making that trip will require that I tighten up consumption in other areas. Most Americans could reduce their overall consumption of energy, goods, and services by at least a third with a little thought and better practice. Finally, don’t waste money and fuel on lousy skydives! Focus on well planned jumps that have a high probability of success and the feeling of reward that comes with that. You’ll learn faster, be safer, and maybe be just a tiny bit greener too! There’s an old saying, “Dirt dives are free.” Use your time on the ground wisely and your time in the air will be well spent.
  9. How To Be A Hero, Kinda Maybe you’re a limelight magnet and maybe you’re not-- but if you like to mess around with parachutes, the limelight might follow you regardless. Even if you don’t necessarily seek it out, there’s a chance that someone will find out you’re a skydiver and ask you to--well--jump into something. A grand opening, for instance, or a wedding, or a local event. Before you slink away, hold on! If you’ve got the experience under your belt, there’s really no reason to turn it down out-of-hand. This could be a great learning experience if you’re able to commit the time and wherewithal to put in the planning. Expanding your skill as a jumper is always a worthwhile endeavor. After all, a demo (or, as it is officially known, an exhibition/display jump) doesn’t have to be a stressful proposition. Unless you’re Kenyon Salo (or anyone else on the Denver Broncos Thunderstorm team), it doesn’t necessarily stipulate a nail-biting night jump that swoops you through a spiderweb of cables to a landing in front of a screaming stadium audience. It may surprise you that, for demo jumps performed under specific conditions, you don’t need a USPA D-license or a pro rating. Spoiler alert: It doesn’t even necessarily mean that you’re landing in front of an audience. Doing a demo jump simply means that you’re jumping into a location other than an official registered drop zone. To get a little clarity, I talked to Neil Amonson, who has been a demo jumper par excellence for quite some time. Once a member of the legendary GoPro Bomb Squad, Neil now runs Jump For Joy--an incredible skydiving-driven inspirational/educational youth project. (You should stop scrolling right now and sign up.) For a little help getting your homework started, read on. Give It TimeA demo starts -- of course -- on the ground. If you’re approaching the idea of doing a demo jump for the first time, you should give yourself about a month’s worth of lead time to make all the necessary arrangements and file paperwork. Aside from the not-insignificant challenge of finding an aircraft to do the deed, you can expect more than a few checklists to work through, the details of which change according to the details of your unique jump plan. Determine Your Level.If you skew to the new, you’re very likely going to find your footing as a Level One or “Open Field” demo jumper. While the experience and license requirements are the same between the two. but Level One and Open Field jumps are classified differently based on area. If the landing area covers up to 500,000 square feet, the landing area is classified as Level One. If it clocks in at more than 500,000 square feet, that’s when it becomes a "open field.” “There are some little details between the two that makes a Level One slightly more advanced,” Neil explains. “For my jumps, when I measure up the LZ and see how many square feet it is, that lets me know how complex of a demo it is likely to be. ‘Open field’ is a piece of cake and very low stress. Level 1 is still pretty easy, but I probably couldn’t do it blindfolded. Level Two is more serious--and a stadium usually has my butt a little puckered.” “Because it shows up on the paperwork, I think the level system helps the FAA understand how much risk is involved,” he adds. “The lower the level of the LZ, the less they probably stress about the jump as well.” To jump into a Level One or Open Field LZ, you’re going to need at least a USPA C license and 200 jumps in your logbook, 50 of which must have been made within the past 12 months and five of which need to have been done on the same model and size canopy you’re planning to use on the demo. If you’re significantly more seasoned, you can hook up with an Instructor-Examiner and get your PRO rating to do Level Two demos. This is the rating you’ll need to jump into any stadium, no matter now big. (Ask anybody who has jumped into a stadium why that’s the case, and they’ll probably tell a rotor story that’ll curl your hair.) Assess the Landing AreaIf you’re considering a demo, your first stop should be a technical requisition of the landing area. (If this wasn’t going to be the top item on your list in the absence of advice, we would perhaps recommend binning the idea of a demo entirely.) If you’re a level-one demo jumper, you’ll need loads of room. You’ll soon see why the “open field” moniker applies. For a Level One jump, you’ll need to be jumping into a landing area no smaller than 250,000 square feet. When you’re jumping into an area over 500,000 square feet, you’re in an “open field.” Most open-field athletic areas constitute a Level One area. That might sound enormous--and it is, at a minimum of 500’x500’--but don’t sniff too soon. The additional stresses of a demo jump are going to make the experience sufficiently interesting to hold your attention. Get The Rest of Those Ducks In a RowAfter you’ve collected all your in-date identification (specifically, your parachuting license and reserve repack card) for presentation, you’ll be working with the aircraft operator to do the paperwork. Get ready to leap into the exciting world of waivers, any required secondary insurances and the holy NOTAM. Let’s take a second to define “NOTAM,” if this is the first time you’ve come across the term. NOTAM is an acronym that stands for “Notice to Airmen.”* A NOTAM is, essentially, a heads-up to pilots and the FAA at large that flags what you’re up to in the airspace. A NOTAM allows you and your aircraft to fly a stated altitude and pattern within a stated time window. As well as Google Maps, you’ll also be using a website called Skyvector to complete your filing, because the FAA will want see your LZ on a sectional chart as well as a satellite image. It’s important to note that a NOTAM is not a guarantee that your jump’s gonna happen. It can be turned down by the FAA. Neil suggests filing a 7711-2, also called the "Application for Certificate of Waiver or Authorization,” no matter what level of demo you’re planning. “While it's not required for Open Field and Level One landing areas, it's the one piece of the puzzle that absolutely ensures that everyone that needs to be on board is on board,” he explains. “It's basically the golden ticket from the FAA that says ‘we approve of your plan.’ I used to try and skirt the rules for doing the paperwork and--even though I was legal!--one time, the FAA called my pilot and told them not to let me jump because we disagreed on what type of landing zone it was. Ever since then, I’ve done a 7711-2 for every demo and I haven't had one turned down in ten years.” While page 169 of the SIM explains how to fill out a 7711-2, Neil says that a little mentorship will go a long way. “The best way to learn how to fill it out is to have a local pro-rated jumper--who has filled one out before--let you see one they’ve submitted,” he explains. “If you were just to look at the application, it’s kind of confusing, but when you see it filled out it makes more sense.” Take note: The higher-profile your jump, the more likely it is that the FAA will come out and watch to make sure you didn't ask permission for one thing and then do another. Dial In Your Comms and Your Crowd ControlYou’ll need to conspire with a ground crew to manage your adoring crowd in accordance with the guidelines in the SIM (unless you’ve figured something else out and gotten it officially waivered). For Level One demo jumps, the crowd management suggested by the USPA allows skydivers to drift over the spectators with sufficient altitude (250 feet) to prevent a hazard to anything or anyone on the ground. (That means you’ll be landing at least 50 feet from the spectators. The USPA, in its benevolent wisdom, doesn’t want you toddler-bowling.) “A rule that is often forgotten about,” Neil warns, “is the requirement for ground-to-air communications between the ground crew and aircraft. This is easy accomplished with a radio--or even texting, when you’re only going up to hop-and-pop altitude.” “There also needs to be a backup, if those comms are lost,” he adds, “that can signal to the jumpers that the LZ is not safe. That’s your ‘no comms’ plan. On my demos, the ground crew usually puts a big X down where we are supposed to land. We tell the ground crew that, if we lose comms and we should NOT jump, to remove the X from the LZ. If we look out of the plane and don't see the X marking the spot, we know something happened, and to stay in the plane. In all the years I’ve been doing demos, we've never actually needed to do this, but it's good that your ground crew knows, in case the FAA shows up, to make sure you are sticking to your plan.” ...And Don’t Jump When It’s Not JumpableGreat! So you have your filings approved, your ground crew is stoked, your crowd is assembled and your prop is turning...but the trees are bending over more than a little bit at the top and there’s weather creeping in. The USPA recommends a maximum wind of 15 mph for a demo jump. What now? “The hardest part of a demo just is knowing when NOT to jump,” Neil notes. “It is soooo hard to say no when it's game day and you just want to pull it off the winds are strong and gusty.” “Also watch out for the winds aloft,” he insists. “Your spot is everything. There have been a few times I've done demos where we’ve drifted into the next county, and that always happened because it was calm on the ground but NUKING up high-- our pilot wasn't a jump pilot so he didn't think it was important--and we mistakenly assumed that calm winds on the ground meant calm winds above the ground. Whoops.” Use Your New Skills For Good>Demo skydiving inspires people. It does! There’s something semi-magical about descending from on high and (hopefully) touching down like goddamn Tinkerbell in front of a cheering crowd. That crowd’s general concept of what-is-possible for themselves, the world and physics will change, at least a little bit, for the good...and that’s almost certainly worth the effort of prep and paperwork. N’est-ce pas? *This author looks forward to a verbiage change away from crusty old gendered language. “Notice To Airpersons,” perhaps?
  10. The ‘father of skydiving’ shares a glimpse into his incredible knowledge. Prepare for knowledge bombs, anecdotes, and entertainment as Bill takes you on a 50 year journey through his experience of skydiving in his renowned ‘History of Skydiving’ presentation. Video shared from Skydive The Mag
  11. Subject: Exchange of Aerodyne semi-stowless deployment bags supplied for Icon harness & container systems. Status: Mandatory. Compliance: Completed by April 30th, 2018. Authority: Gordon Sellers, President Aerodyne Research LLC Date of issue: December 18, 2017 Identification: All semi-stowless deployment bags, with side tuck tabs and magnetic mouth closure, sold with our Icon containers or as a spare part from June 2015 until October 31st, 2017. This bulletin does not affect the semi-stowless deployment bags delivered after Nov. 1st, 2017, which have red stow pockets for the magnetic mouth closure system. BackgroundIn 2015, Aerodyne began to offer a semi-stowless deployment bag as an option. In the last year there have been reported irregularities with premature releasing of lines (known as a line dump) where this bag has been in use. Aerodyne has thousands of Icons in the field for many years with regular deployment bags using rubber stow bands with no known issues regarding line control during deployment. Based on these reports, Aerodyne has performed additional tests on the design of the semi-stowless bag in different conditions. These conditions accounted for a wide variety of variables such as canopy sizes related to the bag size, types of canopy fabrics, types of lines, opening speeds, and more importantly, a variation of canopy packing techniques that we understand are used in the field. Through this additional testing we have determined that some of these conditions can exist, causing a premature release of lines from the bag. This uncontrolled deployment of lines may cause variations in opening characteristics, and could lead to lines being caught on the container or jumper. As a result of continued development of Aerodyne’s products, an improved semi-stowless deployment bag has been designed which better addresses these issues. These bags are delivered with all new Icon containers where this option is required. To increase safety for everyone using the semi-stowless design, Aerodyne wishes to offer every Icon owner to have the latest version of this bag. Thus, Aerodyne has decided to offer an exchange program and upgrade all the original semi-stowless deployment bags, and remove the first version of bags from further use. This replacement bag and return shipping to you will be at no charge to the customers, and will not distinguish if the bag is in a rig that is sold second hand. Simply put, if it’s an Aerodyne semi-stowless bag, Aerodyne will exchange it to the new version free of charge. Until users have received their new bags and wish to jump their equipment, we recommend that the packing instructions for the semi-stowless bag be noted and followed. We have experienced a variety of packing methods on the semi-stowless bags in the field, and would remind users that free stowing lines in any type of a semi-stowless bag is a technique that requires understanding and attention. Action RequiredIn an effort to minimize disruption for our customers, we are in the process of manufacturing the new replacement bags and the practical exchange can start from the second week of January 2018. New semi-stowless deployment bags will be exchanged upon return of the original semi-stowless bag. To prepare the exchange of these bags, and for Aerodyne to manage the program in the best possible manner, customers must register on Aerodyne’s website. This can be done as soon as possible. Actions for customers to take: Visit https://www.flyaerodyne.com/registration/ and register your request for exchange. Please note this is important, even if you don’t send in the bag straight away.You will receive an email acknowledgement of your registration. Please keep this for your records. Please print and include a copy of this document when you return your bag for exchange.We will start the exchange process from the second week of January.With about 500 bags in 10 different sizes in the field, bags will be manufactured and made available in the order they are requested. The sooner you send your bag in, the earlier it will be replaced.Bags will only be exchanged upon receipt of old bag.If you have no need for a new bag immediately, please wait a while and let your skydiving friends who are active and maybe in a more jumpable climate get their bags first. Exchange CentersTo aid in the process of distribution, after registration old bags – with a copy of the registration – can be returned to the nearest exchange center to you. Once received we will process a replacement and send within two weeks. North and South America (USA Canada, Mexico, South America) Aerodyne Research LLC, 1407 Flightline Blvd, Unit 14, Deland FL 32724 Europe Aerodyne Research Europe c/o Herman Landsman Hoofdweg 101, 1795 JC De Cocksdorp, Holland Australia Mee Loft c/o Koppel Solomon 84 Park Rd, Woolloongabba, QLD 4102 Rest of World (Africa, Far East) Aerodyne Research Manufacturing 115 Marshall Drive, Crawdord Factories, Mount Edgecombe, South Africa 4300
  12. March is safety month, and what better time than just before the Northern Hemisphere's summer season to refresh yourself on information you may be rusty on, or just become more educated in the various safety aspects. Last year we published an article with what we felt were some of the most important safety related articles published on Dropzone.com at that time. Since then we have had several new pieces of information published, that may help you in staying safe out there, from canopy control to exit separation. We've also included several safety day events that are happening around the world later this month. Here's a list of what we feel are 5 of the most important articles submitted over the past year: Teaching Students To Navigate The Landing Pattern In our most recently published safety article, coach and IAD instructor rated Corey Miller discusses some of the core aspects of landing patterns and how students are taught to navigate them. The article focuses specifically only the way instructors relay landing information to students over radio, while perhaps not allowing the students to truly learn for themselves what is important to look for and more closely address the subject of learning to land as opposed to being told how to land. Staying Current During Winter While this article may be a bit late for the northern hemisphere, winter is approaching down south and many useful tips can be learned. In the article, Brian Germain discusses the benefits to staying current during the off season and provides readers with a number of useful exercises that can be done to ensure optimum efficiency when you return to the sky. There's numerous images included to help you understand the setups and how they work, as well as exercises that addresses specific individual disciplines. Exit Order Safety Another article by Brian Germain, on the topic of exit order safety. The main focus of the article revolves around establishing and discussion the different types of jumpers and how their time under the plane may vary, and in turn to establish who should jump when and why. Not only is the direct exit from the aircraft addressed, but the article further discusses exit order importance with regards to exit timing and landing area. In the comments section, Brian goes on to acknowledge the possible ambiguity in the term "prop-blast penetration", used in the opening paragraph and says that the term can be replaced by such terms as "forward throw", "relative wind penetration" or the more self-explanatory "horizontal distance traveled". When Should You Upsize Your Canopy The first of two very useful articles on the topic of canopy size, this article was a combined effort by Melissa Lowe, Barry Williams and Jason Moledzki. It uses numbered points to address 10 factors that one should look at when considering canopy size. Most of the time the thought is on downsizing, as one feels more comfortable with their current setup, but for some people - the solution to many of their problems may actually be to head in the other direction and consider upsizing their canopy. There are numerous variables involved that could prompt one to require an upsizing, from gaining weight to even jumping at a higher elevation. At the end of the discussion, there is a Canopy Risk calculator (created by the USPA), which is intended to act as a guideline for you to see how much of a safety risk you are with your current setup and skill level. It's Not Only Size That Matters - Thoughts on Canopy Upsizing The other canopy upsizing article we featured was submitted by Dave Kottwitz and focuses more on retelling lessons learned when he upsized from a Triathlon 210, to a Spectre 230. On his third jump on the new, larger canopy Dave ended up breaking his leg in six places as well as dislocating his shoulder. In the article, he looks at what caused the problems and why one has to realize that upsizing your canopy is not an immediate guarantee for an increase in safety.
  13. IntroductionBoogies, skills camps and destination events are now available in the farthest reaches of the globe - taking place in countries that range from reassuringly orderly to exhilaratingly shambolic. Wherever you are heading, be sure to bone up on all the information you might need before you go - and prepare accordingly. Background research both specific to skydiving and for travel in general will aid your journey under any circumstances, favourable or otherwise, but the more you know in advance the better off you will be when things get complicated. Somewhere that is putting on a skydiving event might simply operate very differently to what you are used to, and the more you can do in advance to set yourself up for success the better. If any appropriate information has been overlooked by the event organisers and you are left in the dark without adequate briefings and knowledge, then ask around - skydivers love to quack on about stuff and those that have previously attended a particular location will tell you the things you really need to know. Skydiving events of any size contain a lot of moving parts that must all work harmoniously to keep people jumping safely. Myriad financial and logistical puzzle pieces require being carefully pulled together over the course of many months to successfully stage a gathering above and beyond the scope of a dropzone’s usual activity. These numerous variables mean there is a lot that can potentially go wrong - the weather might totally crap out and leave everyone fighting for whatever slots that might become available, a broken thingumy may ground an aircraft and significantly reduce lift capacity (or even scratch it completely) or someone can easily enough pick up the kind of injury that demands all jumping operations be shut down for a bit. The list of things that can cause problems and inefficiencies is long and unpredictable - and while the likelihood of the event organisers doing anything other than their very best is slim, they simply might not have the available mental power to stay on top of a snowballing situation. So, what should you do when you are at an event where the wheels are coming off? Buddy Up:If you are used to jumping in a country with lots of rules that must be adhered to while parachuting you can quickly land well outside of your comfort zone in the sketchier corners of the map. Teaming up with another human who can watch your back, both during jump procedures and on the ground in more general ways can provide a measure of reassurance not formally provided. Someone more experienced is good, but anyone who can objectively and reliably keep an eye on you is a solid plan. Check in with each other before and after every jump and at various points throughout each day. Also let one another know how to access vital documents and important personal items should anyone end up taking a trip to the hospital or the police station or the loony bin. Use Your Skills Wisely:Always keep both eyes on your own safety. At any boogie it is very easy to get swept up onto jumps where you are really less than comfortable. If a boogie is running away from itself it is more important than ever to correctly asses and manage the jumps you are doing. Nobody is going to do that for you. Remember that the real rewards are in the endless journey. A nicely formalised and arranged skills camp is the time and place to stretch your legs. Understanding you current limits and working sensibly with them is the path to a great time and safe jumps. Wisdom is calling things to heel when everyone around you is getting looser by the minute. Take Responsibility For Your Data:You can pretty much guarantee that by the time the boogie kicks off any dropzone internet will be down for the duration. Whatever reliable bandwidth the facility has available will likely be reserved for the running of crucial operations, and not for you to WhatsApp photos of each other of someone with a bottle of Jaegermeister duct-taped to their face. A local pre-paid mobile bundle is often the most reliable and affordable choice, but whichever way you want to sort it out some personal phone data is well worth the money. The more overwhelmed an event becomes, the higher the chances are of someone going missing or taking a trip to hospital - you can use the navigation and location tracking services of modern smartphones to find your way back to the airfield or to help look for a lost person. A active messaging group for all of your party can enhance a group experience but can also provide a valuable safety net for communication when everybody is getting shitfaced and things are getting weird. Be Ready:Impending chaos will likely first show itself as wildly inaccurate call times. A twenty-minute warning might mean you will be jumping either right away or hours from now - so the best plan is to always be ready. If your group can rock and roll at a moment’s notice not only will it aid the quality of your jumps, such exhibitions of professionalism will possibly ooze out of you and influence those close by who are less coherent. Help Out:If things are frantic, offer to help. If you have some local knowledge and are surrounded by disgruntled people who have travelled far to attend, then perhaps round them up and show them a good time. Chipping in even with seemingly insignificant things such as making the tea might free up other people better positioned to get stuck in with that broken aeroplane problem or downed computer network. Patience:A spoonful of patience goes a long way. If things are devolving into chaos aim to ease through it rather than throw wood on the fire. Try to remember that planning and executing a boogie takes a lot of work from all the people involved with the DZ and they rarely (if ever) make any money - and certainly not more than the usual daily business of the place. Not getting all up in people’s faces might help things to run smoothly again and shouting at the staff will help no-one. Speak Out: However! Don’t be afraid to speak up if you can see that something is dubious or outright dangerous. Stick your chin up and your chest out and say “What the fuck is this, you clueless morons?” Those responsible for an event that is going to shit may well be under fire from all angles, but if something is wrong they are required to honour everybody’s safety and fix it. Conclusion:All told, if your life allows you to own a parachute and use it recreationally then things are pretty good. Any kind of skydiving jamboree you attend will most likely be filled with treasured experiences you will talk about for years to come. If the odd one does not pan out exactly as you were hoping, then attempt to handle it in the most positive way possible - try not to make things worse, help others be safe wherever you can, and wring every bit of knowledge and experience you can from it to apply going forwards. If you do find yourself at an event that devolves into the kind of chaos where you are genuinely worried about making though with your personage and sanity intact - you can always simply walk away.
  14. Australian start-up Dekunu Technologies have spent much of 2017 teasing the release of a new breed of altimeter. A cool, but somewhat cryptic marketing campaign has generated a great deal of excitement but so far is light on actual details. Why? Behind the project is Brent Chandler - entrepreneur, skydiver and life-long coder. He joins us to shed a little light on the Dekunu project - how it got started, and where it is going. Can you begin with a little bit of personal background? “Without going into too much detail, I created a technology-based business within the hospitality industry in Australia, and over the last nine or ten years developed it to the point where it now runs itself. Once I reached the point where I had successfully built myself out of the company I found myself looking for something that ticked all the right boxes - a tech project that I was passionate about and would allow me to retain a lot of freedom to travel and skydive. After about six-months of conceptualising various different ideas, Dekunu stood out as the obvious choice. I have been passionate about technology my whole life, and although I have always struggled to ever learn say - a second spoken language, computer languages stick with me. For me programming is logical and makes sense. I can see it.” What were the first steps in making this idea into a real project? “Hardware technology. It was a tech genre I had never experienced before. Tech for me had always been software, writing code onto a screen - whereas with Dekunu we are creating concepts, schematics and then a physical product. This was super exciting for me to sink my teeth into, but admittedly intimidating as well. Before we got started I had little idea about what was involved. We got some electronics kits, and a year ago I made the first prototype. The first four prototypes were really just experiments in my understanding. We were using off-the-shelf components and writing code to get them to talk to each other. One of the biggest hurdles was when we moved on to writing our own complete board - where every wire, component, capacitor, resistor and transistor needed to be meticulously arranged. I wasn’t aware of how complicated that process was going to be - even now most days I will have hour-long conversations with our hardware engineers about the placement of one little half-millimetre sized component.” What challenges have you faced creating hardware that needs to work reliably in a skydiving environment? “Earlier in the prototyping process we didn’t have much consideration for things like operating environments - large temperature differentials, humidity requirements, impact resistance or anything like that. We just wanted it to work and then figure out where it was going to break. Being meticulous through all the various versions means that now we can very be specific about our requirements. We need to know what happens if someone leaves their device in the front of the plane under the engine bay and it gets to seventy degrees, or if it gets left outside somewhere below freezing. We have to be very thorough. The devices currently have 285 individual components - if any one of them goes wrong it could potentially harm someone. For Prototype 10 we did a lot of testing ourselves. All of the devices were jumped and the data compared before they were sent off to our team of testers and friends around the world - our Dekunu ambassadors. We decided to run the ambassador programme for a couple of reasons - it is a great marketing opportunity to have influential flyers from around the world running our equipment, but the vital part is exposure to testing environments that highlight things we simply cannot learn from jumping in Byron Bay every day. We have the luxury of being able to make mistakes with the prototypes, but cannot once we start selling the devices. We receive a lot of emails from people voicing their frustration that they cannot yet get their hands on one, and sure - we could capitalise on the engaged audience but to do so too early could very well result in shooting ourselves in the foot.” Everyone wants to know what it does. What does it do? “Without revealing some big, soon to be announced, functionality, the device is going to be all encompassing due to the infrastructure we are creating. Imagine that you come down from your jump and have not plugged into a computer or anything and you have access to all the information it has recorded - a lot of which at the moment without a SmartAlti is dominated by guess work, ego and bias. People will be able to answer a lot of questions with complete accuracy and answer them in the landing area. What was the exit separation? Exactly how hard was that opening? Why did people land off? What was the wind doing? Did we track in the right place? Did we open too close to each other? We want it to be so intuitive and connected that it works seamlessly with every type of device. You don’t have to be plugged into a computer for hours afterwards - you can be in the bar with your friends and have the whole experience on your phone. Also not just your information - a single dot on a screen. All your mates on the jump as well. The entire experience. For many things in skydiving, simple is best. Does a device that is packed with features run the risk of over complicating things to the point of distraction? “This is something we have discussed at length. No matter what happens - as soon as you jump it switches mode and there is nothing you can do on the device except see the altitude on a massive screen. At the moment the device enters a Plane Mode showing heading, ground speed and some other neat features like simple safety tips and reminders on the way to altitude such as when to remove your restraint, check your gear, get a pin check - things like that. We also have a version of the software that includes a student mode - which removes any unnecessary complications. Student mode could, for example, include the important things they need to remember about their jump plan. We are working on making this the best possible device for all users. We’ve saved the complications for our number crunching servers behind the scenes” Brent is more guarded about some of the far reaching potential that fully networked, intelligent altimeters might have for the future of skydiving - sensibly circling back to the importance of the unit itself being success before the big plans happen. “We have done an enormous amount of work on the backend and the visualisation systems - this data that people will have access to is going to allow them to learn so much more from their jumps. It is important for everything to be as intuitive as possible - if we create a system that is good but time-consuming for people to use, then they are not going to use it. We haven’t created this just for the technologically adept - we want it to be the default choice for all skydivers and not just those who like gadgets and want their altimeter to have a touchscreen. Our core ethos is about how this is going to bring more awareness to the sport of skydiving. More data, more transparency - that is really the focus. We see things progressing to the point where, such as with an AAD - if you don’t have a networked altimeter then you are not jumping. The idea being that this will become as normalised as owning any simple altimeter in the way you are required to now - the pricing is not much different, and the information will be so valuable that this is absolutely the way forward for the sport.” The more elaborate details of what the Dekunu device does, and could do, remain to be seen and proven - but anyone who uses a modern phone is able to imagine the prospective gains that one of our mandatory pieces of safety gear becoming fully networked and similarly sophisticated could mean. Within recent history mobile technology has profoundly altered the way our daily lives operate, and transporting this potential into the skydiving environment is a very exciting prospect that could well have an amazing effect on how well we do what we do - how quickly we learn and how safe we all are. Brent and the Dekunu team are hard at work turning these ideas into reality.
  15. Advice From Jeff Dawson, The World Record Holder for Birthday Suit Skydives Milwaukee might seem like an odd place to rack up a truly epic number of naked skydives. You might expect conservatism and bitter winters to, y’know, get in the way. However, that’s exactly what Jeff Dawson--based at Sky Knights, near Milwaukee--has been doing for more than two decades. Of a little under 4,000 skydives, Dawson has done 722 of them naked, which is the world record by a long shot. Along the way, he has founded the Society for the Advancement of Naked Skydiving, or “SANS,” which keeps track of the world’s current naked skydiving records. (See what he did there?) At any rate, Dawson presents a wealth of hard-earned wisdom for skydivers eager to strip down before they jump out. Whether you’re doing the traditional birthday-suit huck for your hundredth or a way to pass the time while your jumpsuit is at the cleaners, Dawson has you (un)covered. We reached out with our most pressing questions. Q: Why is it that you love jumping naked so much? Dawson: It started off it was a naughty thing to do. I am a fairly conservative person, and it was naughty, so it was fun. Then it got to be the thing, and now it has become a creature all its own. The fact is that I’m not really a group-skydiving guy. I like just to get out of the airplane and enjoy the world around me by myself, just enjoying the awe of the situation. Naked skydiving makes that just so much better. You are just hanging out there. Nobody can see you. There isn’t a care in the world. That, to me, is pure freedom. I never set out to be the world record holder for naked skydiving. It just happened. I don’t go out to see how many naked skydives I can make; it’s just that I like doing it and the club I belong to is very naked-jumping friendly. I have made naked skydives where nobody has said one word about the fact I was naked. They are just so used to it. I have made at least one jump in every calendar year for almost 21 years, and I have made at least one naked jump every calendar month for 16 years. I did three naked jumps this past December when it was maybe 20 degrees Fahrenheit. At Sky Knights, they call [a wintertime naked jump] a “Dawson Pop” because I’ll be doing a hop-and-pop naked. Q: Okay--some basics. Since we all quite obviously have to wear some gear when we jump out of a plane, what is actually considered a “naked jump”? Dawson: Everybody has their own idea of what qualifies. For the purpose of the Society of the Advancement of Naked Skydiving, we say wrist to wrist and neck to knees. That allows safety equipment: a helmet, goggles, gloves, altimeter, shoes and socks if that’s what you choose to do. I have done only one jump where I was completely, 100% naked (with the rig, of course). No helmet, goggles, shoes, altimeter, socks...they called it a “naked naked” jump. Q: Did you start doing the naked thing before you started jumping or did you start doing the naked thing after you started jumping? Have you always been into naturalism? Dawson: Absolutely not. I made my first naked jump on my 100th skydive, but as far as the rest of it goes, no. I don’t even wear shorts in the summertime; always pants. I have nothing to do with nudism, naturalism...anything like that. Except for the naked skydiving. Q: What was it about that first naked skydive that got you into it? Dawson: Actually, it wasn’t that first one that got me going. Actually, it wasn’t that first one that got me going. I didn’t do another naked jump for probably 3 or 4 years afterward. A young female jumpmaster who liked to skydive naked put together a 4-way for a jumper’s hundredth jump, and she asked me to be a part. I think that was September 2001. The same thing happened a month later in October. We decided that we would see if we could make at least a 2-way every month for a year. We did, and of course there were several other people involved at different times. After a couple of years, she moved away, but I just kept going. Q: If someone is visiting Sky Knights on any given weekend, how likely is it that at least one person is going to be naked at some point? Dawson: Pretty likely. I do it more than most people, of course. If the conditions are right, I usually do my last jump of the day naked. Q: What’s the first step to doing a naked skydive right? Dawson: The first thing you have to do is to see if your dropzone even allows naked skydiving. I travel a lot and have been to a lot of different dropzones and talked to a lot of people about this. You have to understand that there are plenty of dropzones that actually can’t facilitate naked skydiving; where if there is any nakedness going on of any kind, the dropzone will get kicked off the airport because that’s in their contract, or charter, or whatever. Then you have to decide how public you want to make it. Cameras and social media are out there in such prevalence today that you have to be careful that someone’s livelihood could be endangered if this type of thing got out in the way that things do now. Unless you want the entire dropzone out at the landing area with cameras, you’ll have to have help to keep it quiet and under wraps. I blame social media for the fact that naked jumping isn’t as popular now as it used to be. Q: How can you set about controlling those variables? Dawson: If you want to do a naked jump stealthily and not have the whole dropzone watching, you can make that happen by arranging for a separate pass or landing area--or just talking to the people who are on the jump and asking them to turn off their cameras. People should understand that it’s a very legitimate concern. Q: How do you go about preparing for a naked skydive? Dawson: First off, I would definitely suggest doing it with someone who has done at least one before. You will want to decide what you are going to do about clothes. Sure, you’ll have a 200-square-foot toga to wear, but what next? Personally, I have a set of shorts that I wear over my leg straps, and then I have a pocket on one of the leg straps. When I am in the plane, I take the shorts off and put them in my leg pouch to put on after I land. I have seen people tie shorts onto a leg strap with pull-up cords. I knew one person who actually stuffed his shorts in the tail of his canopy. Amazingly, it didn’t affect the opening. You can always stash clothes at the landing area, of course. When you’re gearing up, make sure that your straps are relatively tight. We have a saying for the guys: Make sure that you have your junk in the right spot, because you can always cut away from a line-over but you can’t cut away from a nut-under. Nipples can be a problem, too. You can deal with that by either locating the chest strap above the nipples so that they’re out of the way or use band-aids to reduce the snag hazard, especially if you wear jewelry there. I have never seen it myself, but I’ve heard of at least one person who had jewelry ripped out of her nipple. Q: What’s different about the jump itself? Dawson: What tends to happen is that, after one person decides they’re going to do a naked jump, a bunch of people get on it. It can easily turn into a big zoo, with a dozen people on the jump who have never jumped naked before. That’s not a good idea. Naked jumping is entirely different from clothed jumping in that it changes the amount of control you have over your bodyflight. There’s a whole different dynamic: for instance, coming into a formation. If your mode normally is to come in fairly hot and slow down last minute to enter the formation, you’ll soon discover that that doesn’t work as well with a naked jump because you don’t have the drag. People often find they can’t stop. So if you can do it with 2 or 4 people--something like that--it usually works out better. When you’re in freefall, you’ll feel like the container is falling off of your back--or is not centered--because it’s touching your skin and you can actually feel where it is. Don’t freak out. If you’ve done your straps up nice and tight, it’s not actually coming loose; it just feels different. Also: You don’t want to get too wrapped up in the naked part of the skydiving and forget about all the other parts, which brings me to probably one of the most important parts about naked skydiving. This goes for any kind of extraordinary skydive. You’re still making a skydive, and you still have to do it safely. You have to make sure your equipment is right, and you do all of your checks. It is really easy to get caught up--especially if we’re talking about a 100-jump person--in the excitement of what’s going on, and forget about the things that are necessary. One more word to the wise: Choose a day when the conditions are right for a stand-up landing. If you slide in even a little bit, you are going to know it. Even grass acts like sandpaper. Q: Any final words of wisdom? Dawson: Do everyone a favor and be cool about it. If you go out and flash unsuspecting tandem students and airport authorities, then you’re crossing the line. Sky Knights operates a PAC in the summertime and when I’m ready to make a naked skydive, there will usually be tandems on the load. I won’t surprise them with my nakedness. Before they are even manifested, I’ll find out from manifest who they are, introduce myself and ask if they’d mind if I’m on the same load. I’ll also do that with other jumpers I don’t know. Most people are fine, especially when I tell them it’s going to be a world record--because every time I make a naked skydive, it’s a world record. I try to be sensitive about who is on the load and not make anyone feel embarrassed. Being polite about it has allowed me to do all those jumps. Got at least one naked jump? Join SANS! It costs a whopping $5 dollars to join, and with that membership fee you get a member number, a certificate for the wall of your cubicle, some stickers and a refrigerator magnet.