HMAS Onslow

HMAS Onslow is an Oberon-class submarine built in Scotland, now on display at the Australian National Maritime Museum in Sydney. The dark hull features a small tower with antennas and stretches about 90 meters in length.

The submarine was built in the 1960s and served in the Royal Australian Navy for about 30 years. After being decommissioned in 1999, it was given to the museum where it has welcomed visitors since.

Th e name O ns low comes from a town in Western Australia and links the vessel to the country's inland regions. The crew's motto was 'Festina Lente', a Latin phrase that guided their approach to decision-making under pressure.

You can walk through narrow corridors and see spaces like the control room and torpedo storage. Signs and guided tours help explain the purpose of each area.

During exercises, the crew managed to sink a large American aircraft carrier in a mock battle, which was considered a notable achievement. After successful missions, sailors raised a Jolly Roger flag, an old tradition among submarine crews.

Location: New South Wales

GPS coordinates: -33.86925,151.19995

Latest update: December 9, 2025 13:10