I am looking for a solution that will allow me to fasten something to my whitewater kayak but allow me to free it simply by yanking hard on it. My knife's quick release sheath does this perfectly; surely other devices exist for this problem?
Specifically, I want to keep a throw bag (nylon bag containing 50'-70' of rope) tucked behind me in the kayak. It needs to be fastened so that it doesn't end up loose in the river if I take a swim (e.g., fail to roll and part ways with my kayak in the middle of a rapid). But if it's needed, it's needed now, and having to fumble with a carabiner with neoprene gloves on could be too slow.
As an example of what I'm talking about, I keep a Gerber River Shorty clipped to my PFD. The hilt of the knife and the sheath are shaped so that the knife clicks into place when inserted, and when pulled with a small amount of pressure the knife pops free, yet at the same time it's never popped free unintentionally or from being bashed around in the gear box.
Do devices exist which, like the knife sheath, allow me to yank the connection loose without requiring any dexterity? But will stay happily connected through normal operations?
I'm explicitly avoiding the use of knots or hitches because a solution which leaves a few feet of rope hanging loose during a whitewater emergency isn't helpful.