My worst dive by far was off South Carolina. Nothing to do with the dive itself, which was cold and limited visibility, but with the weather and, mostly, the boat! It was raining and about 10 divers, the dive master and two boat crew were stuck under a plastic tarp on an old diesel boat. The tarp kept the fumes from the engine in the boat with us. Everyone got sick both on the way out and the way back! It was miserable!