Freediving inside an enclosed space is known as “angling for a Darwin Award”. Doing it in a shipwreck is one of the most dangerous things you can possibly do.

Freediving inside an enclosed space is known as “angling for a Darwin Award”. Doing it in a shipwreck is one of the most dangerous things you can possibly do. You won’t have the normal cues of up and down, won’t have any sort of decent lighting, and all the while your body wants to panic due to CO2. Then, they’d been breathing compressed air. If they reached the surface they’d get the bends, and depending on depth that could kill them or cause serious damage.