I can't say I'm a Gerber fan (at least the Gerber of the post-eighties) but I've stuck with the river master since around 1989 - it is still lashed to my pfd. One modification... I ground the tip down... For me it was never about being afraid of cutting a raft (I wasn't a rafter) or harming my polyethylene whitewater kayak but the danger involved. Fast moving, swirling water is a different kind of venue than dry land. You can be caught in a strainer, tangled in lines, etc., and all you want is a breath of air.
Blunted like this, I was confident I could cut lines or that bottom of that d**n raft that pinned me. It could cut neoprene or, in a pinch, I could have sawed into a poly hull. Why did I blunt it? Non-knife people. They are less able to hurt me inadvertently.
Mid-nineties a guy got in a minor pin on a Sunday afternoon on the dam release lower section of the Ocoee. I was on the river that day, like most days in East Tennessee when there was no free running water, but upstream of the incident. Another boater wanted to help. He thought the best idea was to RAPIDLY extract said boater from kayak by slicing straight across the spray skirt... across the boater's lap. (FYI- If you actually have to slice someone's sprayskirt, you do it along the cockpit loaming... not straight across his lap.) He got the pinned boater out but successfully severed one (or both?) of his femoral arteries in the process. The artery is elastic enough that, if severed close to the groin, it can actually retract that last inch or two up the thigh - a tourniquet is useless... you can't stop the bleeding.
Others got him to the edge of the river and the, then, waiting ambulance. The ambulance didn't move for several (8-15) minutes, apparently attempting to stabilize the victim. The ambulance then drove off slowly... Victim deceased.
Short story... I don't want a good samaritan to make my situation worse rather than better. If my hands are occupied with a broach/pin (or shoulder dislocation - ouch! been there!) then I don't want them pulling my rescue knife from the lash tab and slashing away without a little insurance.
Sure... not a perfect solution. The edges are still sharp - but it helps.
Not a indictment that this blade is the best suggestion. I've not used a Sastre/Spyderco solution but it does look promising. He and I have spoken about it in person.
This is only a suggestion that a blunt tip can help save your life in whitewater. Whether you're struggling for breathe, underwater, semi-trapped or whether it's from a well meaning rescuer who pulls
your knife while you're occupied.
Another anecdote specific to paddling.
A friend of mine, she had been teaching whitewater kayakers for 20 years. (Something I did for a dozen years - it is how I met my wife!) Like many kayakers "in the day" she had a pair of noseplugs attached to the front corner of the helmet by a 6-8" lanyard. She was teaching someone how to roll while at a lake training session. With her left hand, she stretched the lanyard forward by the plugs - with her right she cut downward to sever the lanyard so she might loan the plugs to her student. That downward slash severed blood vessels, tendons and nerves in her left forearm. Aid and a tourniquet were immediate. Unfortunately, she had at least two neurosurgeries in order to restore 80% function to her left hand.
Be careful!