50m
3m - 9m
Boat
Advanced
50m
3m - 9m
Boat
Advanced
Reef, Deep, Other, Rock, Drift
Boat
50m
3m – 9m
Advanced
21% – 23%
O213% at 48m / 24%
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Underwater Sports Inc. (tacoma)
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28.55kmUnderwater Sports Inc. (olympia)
34.38kmSeattle Dive Tours
36.65kmExotic Aquatics Ltd.
40.75kmSeattle Scuba Schools
44.6kmStarfish Enterprise, Exploring Inner Space
45.59kmHidden 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.
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.
Bubble Trapping Under Overhangs — Rock overhangs can trap exhaled bubbles, reducing visibility and causing disorientation.
Reflected Surge Patterns — Surge reflecting off rock faces can create irregular and unpredictable water movement.
Current Funnel Effect — Narrow gaps between rocks can accelerate water flow unexpectedly.
Eddy Pull-Off Zones — Eddies behind structures can pull divers away from the main drift line.
Delayed Surface Pickup — Strong current can exceed surface tracking assumptions, delaying boat pickup.
Vertical Current Shear — Currents may vary by depth, causing vertical separation even when divers stay together.
