Forgot the head. I've worked off 10 boats over here and only 1 had a working head, 3 were certified vessels that had working heads for the Coast Guard inspection only and were immediately removed or disabled after the inspection.
Head or no head could probably be a decent thread in itself.
That surprises me - I've only been on one dive boat that had no head ... the "Rubber Ducky" (14 ft. Zodiak) - lol