RSL is just a Reserve Static Line. It connects from the main risers to the reserve ripcord. When cutting away the main the risers of the main pull the reserve as the main leaves. Personally I don't think the RSL is worth having. That's my opinion. I have had them tangle up in my 3 ring, luckly I didn't have to cut away. It's wize to disconnect in high wind, but I don't know about water. Also with the RSL it can give you a false sense of security. I have seen people cutaway and have the RSL break. I am also paranoid about having my reserve comming out to close to my main and getting entangled. There are other reasons I don't like RSL's anymore, but I don't remember them right now.
