We are all familiar with, and rather tired of, lifeboat hazards but a safety alert from the US Coast Guard combines that with confined space risks, too. Yes, in certain circumstances a lifeboat can be a confined space.
A Port State Control inspector was on board a tanker to conduct a examination. In anticipation of the examination, the crew opened the hatch to the freefall lifeboat to let it air out. As the inspector entered the lifeboat his gas meter alarmed and he quickly exited. Upon investigation, it was confirmed with ship’s equipment that carbon monoxide had collected in the lifeboat.