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Alert Diver is the dive industry’s leading publication. Featuring DAN’s core content of dive safety, research, education and medical information, each issue is a must-read reference, archived and shared by passionate scuba enthusiasts. In addition, Alert Diver showcases fascinating dive destinations and marine environmental topics through images from the world’s greatest underwater photographers and stories from the most experienced and eloquent dive journalists in the business.

Alert Diver is the dive industry’s leading publication. Featuring DAN’s core content of dive safety, research, education and medical information, each issue is a must-read reference, archived and shared by passionate scuba enthusiasts. In addition, Alert Diver showcases fascinating dive destinations and marine environmental topics through images from the world’s greatest underwater photographers and stories from the most experienced and eloquent dive journalists in the business.

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RICHARD PYLE, BISHOP MUSEUM<br />

some shortcomings. Manned<br />

submersibles and support ships<br />

can cost more than $50,000 a day.<br />

The limited mechanical dexterity<br />

of subs and ROVs makes them<br />

poor options for collecting nimble<br />

or delicate marine life. When<br />

conducting visual fish censuses,<br />

use of large, noisy hardware can<br />

make it difficult to approach<br />

marine life, especially compared<br />

to divers using minimally intrusive<br />

closed-circuit rebreathers (CCRs).<br />

PHYSIOLOGY AND<br />

DECOMPRESSION STRESS<br />

Decompression sickness (DCS)<br />

consists of a constellation of<br />

symptoms that result from<br />

decompression stress in excess of<br />

what can be tolerated. A number<br />

of variables affect decompression<br />

stress. How these variables<br />

ultimately influence DCS risk,<br />

independently and in concert, is<br />

not well understood. Improved<br />

knowledge of decompression<br />

stress could help researchers<br />

determine what factors may be<br />

playing a role at different points<br />

ALERTDIVER.COM | 23

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