Viking Rock

Cocos Islands, Costa Rica

Depth

40m

Visibility

15m - 45m

Entry

Boat

Experience Level

Advanced

Viking Rock

Cocos Islands, Costa Rica

Depth

40m

Visibility

15m - 45m

Entry

Boat

Experience Level

Advanced

About Viking Rock

A small island located on the Western Side of Cocos, close to Wafer Bay. Its a distinct helmet shape rock formation, surfacing to several meters above water, and drops to 40 meters below water. Its a great dive to see a large variety of big and small pelagics and beautiful coral formations. Due to depth and strong currents, this site is recommended for advanced level divers only.

Viking Rock Dive Info

Terrain & Features

Deep, Reef, Rock

Entry Type

Boat

Max Depth

40m

Visibility Range

15m – 45m

Experience Level

Advanced

Best Gas Mix

21% – 28%

O₂

CNS Load (20 min)

13% at 38m / 29%

O₂

Multi-Level Dive Planner

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Marine Life

Eagle Rays
Groupers
Jacks
Marble Rays
Reef Sharks
Turtles
Various

Weather Conditions

Water Temperature ℃

Dive Operators near Viking Rock

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Location

Dive Site Hazards

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.

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.

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