Derawan Islands, Indonesia
35m
8m - 23m
Boat
Advanced
Drift, Deep, Muck, Shark
Boat
35m
8m – 23m
Advanced
21% – 31%
O214% at 33m / 33%
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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.
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.
Navigation Ambiguity — Lack of reference points makes exits harder to relocate.
Unnoticed Depth Drift — Featureless terrain can cause slow, unnoticed depth changes.
Camouflaged Hazardous Species — Hazardous marine life may remain unnoticed until very close.
Situational Awareness Loss — Divers may fixate on sharks and lose depth or position awareness.
Subtle Behavioural Shifts — Changes in shark behaviour may be missed without active observation.
Blue-Water Reference Loss — Lack of visual references increases ascent and descent instability.
