Shipwreck Diving

Shipwreck Diving

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Underwater communication is discussed in every basic divera#39;s manual and in all certification classes. Ia#39;m sure everyone remembers all of the hand signals and the meaning behind each. In fact, in clear water, these signals may work fine, but inanbsp;...

Title:Shipwreck Diving
Author:Daniel Berg
Publisher:Aqua Explorers Inc - 1991


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