Its an important problem, very difficult to think which way to rotate etc. when under the sail in the water.
I have an "dakine" harness with a hook with an "acute releasemechanism", but it with a bad funtion when you are under the sale.
I have bought a PROLIMIT hook with a rapid release which is good.
Another solution is to buy Harnesslines from POINT-seven. I have bougth them and I have tried the release-funtion when under the sail.
100 % secure. one problem is that it can selfrelease when sailig, but it has not happened often, a couple of times.
point-7.com/quick-release-harness-lines/?v=f003c44deab6With regards,
John