Jump Run Direction in Safety and Training February 21, 2004 QuoteIf they need 20 seconds between each group, why do you then say they take 10 seconds between each exit? If it were me and I needed 20 seconds for separation, I'd wait 20 seconds. I also think 1/2 mile separation between 2-ways is overkill. Oops, the 10 second note was a typo. The math was right though, 9 segments of 20 seconds each equals 180 seconds. (I've fixed that in the other post.) As for the 1/2 mile for a two way, you may be right. Here is what I said... QuoteLet’s look at two more examples with a hypothetical headwind and tailwind component put in to change the groundspeed. To try to keep it brief, I’m not going to change the desired amount of separation distance. You can decide to use whatever you want there. My post was long enough the way it was. I just used a half mile example throughout for consistency sake. There are a lot of variables as mentioned, and as you suggest, that should be added into the equation to determine the appropriate distance of separation between groups. Size of the formations, type of formations (big way rw, small way rw, freefly, tandem, aff, crw, wing suit, etc.). That would be quite an administrative task to try to get each type of skydiver to know the subtleties of exit delay calculations to the extent of knowing... IF you are a two way and following another 4 way or smaller (which is NOT a skysurfer or wing suit flyer) THEN take a 10 second delay BUT if you are following an rw group of 5 to 12 then take a 15 second delay or 12 or larger then take a 20 second delay, blah, blah, blah, , blah, blah. (Again, don't use these number, its for discussion. Make your own decision.) It seems that it might be more simple for the operator to post a note someplace like the loading tent or near the door of the aircraft that for today the delay is X. Remember one of the things I said was that you need to determine what distance you want and then the math will help with determining the amount of delay. If you don't know what distance you want for separation and you don't know the ground speed, you will never be able to know how many seconds to delay between groups. Who knows how would be the best way to implement a safe delay between groups. Continue researching and teaching I guess. (Thanks for finding the typo/mistake.) -mh.