Had a chance to observe a real MOB situation a couple of weeks ago in blue water between Costa Rica and Panama. I have a new respect for strobe lights and the larger MOB units. What was later said to be a wacked-out crew member of a well known cruise line jumped from the 11th deck on the stern. It was late in the day, calm seas. He tossed a ring with an attached stobe. He was doing maintenance, so he had a PFD on when he jumped. It had a small strobe attached. No surprise, even with a very modern liner, very maneverable, it took about 30 minutes to go 180 degrees at 19.5 knots and the recovery took about an hour plus the launch of a boat and crew. Amazingly, he lived although I was told he had sustained some injury. Despite a clear night and being about 100' up, the light on the vest was difficult to see. The larger strobe was visible about a half mile out. I believe I'll purchase a larger strobe for my MOB system. Nothing like real world obsevation to change your mind. Rick D.