In the past deep sea divers had suits with heavy helmets and an air hose attached. There are stories of the air failing. Because of the extreme pressure, they have found nothing

In the past deep sea divers had suits with heavy helmets and an

25 Terrifying Deep Diver Horror Stories

Have divers ever been accidentally abandoned at sea? - Quora

How deep could someone dive breathing air through an unblockable tube to the surface? - Quora

Why do deep sea divers have to surface quickly? - Quora

25 Terrifying Deep Diver Horror Stories

Diving suit from the 1880s : r/pics

Fashion on the final frontier: The story of the spacesuit

How deep could someone dive breathing air through an unblockable tube to the surface? - Quora