My goal is to skydive safely as possible, I know that most of the time safety relies on the person behind the canopy not the latest gear...but I do know that having these devices can save you're life in an ugly situation where normal hands couldn't act as quickly. I'm talking about AAD's and RSL's here, which are more effective. Whats the difference between them and how do they make a difference? In what types of situations would each benefit, lastly can I use both in conjunction to amplify the safety factor or would this just complicate the rig. Im a student and I think that knowing the difference between the two and how I could use these devices in my rig might benefit me someday.