Underwater diving - Wikipedia

List of wreck diving sites - Wikipedia

effects of water pressure on the human body –

File:Dry Suit Scuba Diving.jpg - Wikipedia

Subnautica, Subnautica Wiki

Underwater diving on Guam - Wikipedia

Surface-supplied diving - Wikipedia

Scuba diving - Wikipedia

Underwater diving - Wikipedia

I love the way human activity is categorized on Wikipedia. I feel this might be how aliens file their human observations. : r/wikipedia

Salvage diving - Wikipedia

Human physiology of underwater diving - Wikipedia

Portal:Underwater diving/Selected picture/18 - Wikipedia

Wreck diving - Wikipedia

Human physiology of underwater diving - Wikipedia