All divers should have these planners. Its important because it shows you the depth you intend to dive down to & by using this planner, divers calculate how much time is needed to be spent out of water before their next dive. Well, season divers usually go buy the high tech gadgeowthat shows you everything but I guess it is still important to know how to calculate using this planner just to be safe.
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1 comment:
i love using this, it's novelty in the midst to technology i think
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