One Ton

Norfolk Island, Norfolk Island

Depth

30m

Visibility

15m - 45m

Entry

Shore

Experience Level

Experienced

One Ton

Norfolk Island, Norfolk Island

Depth

30m

Visibility

15m - 45m

Entry

Shore

Experience Level

Experienced

About One Ton

Also known as Jacobs Bommie. Bottom has many scattered rock formations, covered in algae and corals. Surrounded by clean sand and abundant marine life. Beginner divers are advised to dive with experienced divers or instructors, as currents can be unpredictable.

One Ton Dive Info

Terrain & Features

Reef, Rock, Other

Entry Type

Shore

Max Depth

30m

Visibility Range

15m – 45m

Experience Level

Experienced

Best Gas Mix

21% – 35%

O₂

CNS Load (25 min)

16% at 28m / 36%

O₂

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Marine Life

Butterfly Fish
Emperors
Groupers
King Fish
Parrot Fish
Pelagic Fish
Trevally
Various

Weather Conditions

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Dive Operators near One Ton

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Location

Location details missing.

Dive Site Hazards

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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