Originally Posted by Bigtalljv
I have a rib. No fenders needed
I have a RIB as well. Given the amount of splinters and rusty screws/bolts I see protruding from various docks, I use fenders to keep it from becoming an RUIB (Rigid Hull Uninflated Boat.) Perhaps not needed, but wanted.
As an aside, I see most larger (well, larger than my boat) commercial dive boats use a Polyform ball buoy to mark the end of their current line (a line paid out in case a diver ends up down current.) Those things take up a lot of space. I use a smallish salvaged fender on my current line. Stows a lot easier than a ball (though, granted, it is also a lot harder to see...)