HMAS J4 Submarine

Victoria, Australia

Depth

26m

Visibility

- - -

Entry

Boat

Experience Level

Unknown

HMAS J4 Submarine

Victoria, Australia

Depth

26m

Visibility

- - -

Entry

Boat

Experience Level

Unknown

About HMAS J4 Submarine

HMAS J4 Submarine is located at Port Phillip Bay. This wreck was a J class submarine. The wreck is broken in half and has become a habitat of colourful sea creatures.

HMAS J4 Submarine Dive Info

Terrain & Features

Wreck

Entry Type

Boat

Max Depth

26m

Visibility Range

— – —

Experience Level

Unknown

Best Gas Mix

21% – 39%

O₂

CNS Load (25 min)

12% at 24m / 36%

O₂

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Marine Life

Various

Weather Conditions

Water Temperature ℃

Dive Operators near HMAS J4 Submarine

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Location

Dive Site Hazards

Deceptive Entry Openings — Openings may become restrictive inside due to angle, collapse, or corrosion.
Surge-Induced Internal Silt Shift — Internal surge can move silt and debris without direct contact.
Partial Overhead Environment — Many wrecks limit direct ascent even without full penetration.

Fine Rust Particle Silt-Out — Disturbed rust particles can rapidly reduce visibility.

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