Double Reef

Mariana Islands, Micronesia

Depth

60m

Visibility

15m - 45m

Entry

Shore

Experience Level

Advanced

Double Reef

Mariana Islands, Micronesia

Depth

60m

Visibility

15m - 45m

Entry

Shore

Experience Level

Advanced

About Double Reef

This dive can be multi level and dived from either shore or boat. Its located on the Northern side of Guam island. Easy sandy entry with a gradual slope to 30 meters, then a steep drop to 60 meters. A more appropriate dive for beginners would be Gun Beach, which is located South of Double Reef. Its a very interesting dive with a beautiful coral covered bottom. Abundant marine life all over.

Double Reef Dive Info

Terrain & Features

Deep, Drift, Reef

Entry Type

Shore

Max Depth

60m

Visibility Range

15m – 45m

Experience Level

Advanced

Best Gas Mix

—

CNS Load (20 min)

14% at 58m / 21%

O₂

Multi-Level Dive Planner

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Marine Life

Barracudas
Groupers
Jacks
Nurse Sharks
Rays
Various

Weather Conditions

Weather information for Double Reef coming soon.

Dive Operators near Double Reef

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Location

Location details missing.

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.

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.

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.

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