40m
15m - 45m
Boat
Advanced
40m
15m - 45m
Boat
Advanced
Deep, Reef, Drop Off, Other, Rock
Boat
40m
15m – 45m
Advanced
21% – 28%
O213% at 38m / 29%
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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.
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.
Edge-Accelerated Currents — Currents often strengthen along drop-off edges.
Depth Perception Distortion — Visual contrast can distort perceived depth.
Terrain-Induced Descent — Divers may unintentionally follow terrain downward.
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.
