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This maybe a "dah" question but:
I'm purchasing my first scuba equipment & the questions is, if one has a Oceanic Geo computer on your wrist is it still necessary to have a "depth gauge" with the air gauge console?
Is it a convenience, is it necessary?
I'm purchasing my first scuba equipment & the questions is, if one has a Oceanic Geo computer on your wrist is it still necessary to have a "depth gauge" with the air gauge console?
Is it a convenience, is it necessary?