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What does BCD stand for? 33 fans have answered this question No one has commented yet 91% very easy

what does SPG stand for 26 fans have answered this question No one has commented yet 92% very easy

What is the thing that tu put in your mouth to help tu breath underwater? 26 fans have answered this question No one has commented yet 81% easy

if tu are diving in a depth of 10m the pressure is of ... bar/ata ? 24 fans have answered this question No one has commented yet 33% medium