40m
5m - 15m
Boat
Beginner
40m
5m - 15m
Boat
Beginner
Deep, Night, Reef
Boat
40m
5m – 15m
Beginner
21% – 28%
O213% at 38m / 29%
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Whidbey Island Dive Center
20.58kmAnacortes Diving & Supply
42.14kmEvergreen Dive Service
45.41kmUnderwater Sports Inc. (edmonds)
45.77kmArgonaut Diving
46.25kmBig Fish Expeditions Inc.
55.05km*Frank White's Scuba Shop, Ltd.
55.11km*Northwest Sports Divers
56.75kmUnderwater Sports Inc. (seattle)
57.01kmRockfish Divers
57.52km*Gradual Narcosis Onset — Narcosis may develop slowly, making self-assessment unreliable.
Task Fixation at Depth — Cognitive narrowing at depth can reduce awareness of time and ascent rate.
Increased Gas Density Breathing Load — Higher gas density at depth increases work of breathing.
Landmark Misidentification — Familiar sites can become unrecognisable at night.
Light-Induced Tunnel Vision — Focused light beams reduce peripheral awareness.
Depth Perception Errors — Reduced ambient light increases depth perception mistakes.
Hidden Depth Variations — Complex reef topography can conceal depth changes, leading to unintended profile variations.
Distraction from Marine Activity — High fish activity can distract divers and delay depth or gas awareness.
Rapid Surge Direction Changes — Surge near reef structures can reverse direction quickly, pushing divers sideways into unexpected areas.