I don't dive at all but my river and boat knives have one side full serration and that is the only time I like them too. I am sure for the same reason, wet rope.Wow, that's a beautiful blade.
As a diver, I don't have a preference of blunt tip over pointed tip, but my dive knife has to be serrated (and that's the only time I like serrations).
I like that knife Lagrange. Put a black handle on it and call it a river knife. Blue it's a dive knife.