bn:01989120n
Noun Concept
Categories: Underwater diving environment, Occupational safety and health
EN
penetration diving  No clear surface diving  Restriction
EN
An overhead or penetration diving environment is where the diver enters a space from which there is no direct, purely vertical ascent to the safety of breathable atmosphere at the surface. Wikipedia
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EN
An overhead or penetration diving environment is where the diver enters a space from which there is no direct, purely vertical ascent to the safety of breathable atmosphere at the surface. Wikipedia
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