I'm a diver with everything but a wet suit. Wouldn't expect to be down all that long (i.e. cold water), so it's underwater lighting that I'd rather have in the churned up bottom murk of McKinley.
Doug, as for my winter log, yes, I occassionally find new screw (i.e. prop) marks gouged into her come spring. That, of course, is none of my concern, as it's the (likely drunken) fools doing a high speed run through a known mooring field (full of LOGS!) at night that are damaging thier vessals, not I.
My log is marked and visible to anyone taking the caution to actually look for it, though it's admittedly low in the water. But, hey, I've never hit, much less run over a log at night! But if interested, I'll let you know when I'm swapping it out.