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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

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A Deep Sea Diver Went Out on a Routine Job—Then His Air-Supply

Why do deep sea divers wear boots made out of lead? Why is it important? - Quora

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

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Standard diving dress - Wikipedia

Inventor shows off 'Iron Man'-like diving suit

Why are deep sea divers' hands covered by their suits? The purpose of diving suit is to prevent high pressure, but how do they work? I see in pictures, the lower body

Were there actual cases of old-time divers being crushed into their helmets by water pressure? - Quora

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

In This Issue - Supervisor of Salvage and Diving

Why do deep sea divers wear boots made out of lead? Why is it important? - Quora

What mixture of He and O2 is used by sea divers? - Quora

Do deep sea divers just like piss in their suits? - Quora