wanted divemaster books

im after divemaster books to do some pre study


Contributed by rickG added 2008-09-24

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AquaTech AustraliaAquaTech Australia
Since 1998 AquaTech has been at the forefront of the design and manufacture of professional photographic accessories.

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Rays, the Gristly onesRays, the Gristly ones
Similarly to sharks, rays do not have a true bony skeleton like most fish but instead have a cartilaginous skeleton made of the same material as our nose and ears ...
Underwater Card 2