eree wrote:guys, i mean if you even have a knife in every possible place of your harness or wetsuite, you just have not time enough to reach to it and to save yourself.
Until you've experienced every possible situation you simply can't say that. And in my opinion it's poor form to try and convince people to forego valuable safety gear - just as it's poor form to tell them all will be swell as long as they have the right knife.
Fortunately, I have never had to use my knife for myself - but I have had to come to the aid of others on the water with my knife SEVERAL times. You won't prevent a lofting with your hook knife - but things can get very unpleasant at a fairly leisurely pace on the water. There can be plenty of time to think to yourself "now why did I decide not to carry a 2 oz knife?"
I know it's a different deal, but we had a guy land in the water with his paraglider. Others dragged him into the beach, and headed back up the ridge while he continued to pull his gear up onto the dry sand on which he was standing. He got tangled in the lines, dragged back into the water, and drowned. I'll bet he wished he had a 2 oz knife at some point.
Hook knives - when a smart ass comment just isn't enough.
(Although this reminds me of one of the best quotes heard over the radio when a bunch of friends were hang gliding, and one of the guys was going down in the rocky chasm on the back side of the mountain. When our victim stopped his terrified narration just long enough for another pilot to speak, that other pilot came on and said "shut up and die like a man!")