HMAS Koala

From Our Contribution

HMAS Koala
HMAS Koala.jpg
Navy photo
Name HMAS Koala
Owner Royal Australian Navy
Builder Cockatoo Docks & Engineering Co, Sydney
Launched 4 Nov 1939
Completed 6 Feb 1940
In service 7 Feb 1940
Out of service 18 Apr 1957
Fate sank in the Brisbane River Jan 1974
General characteristics
Type Boom Working Vessel
Tonnage 768 tons
Length 178 feet 9 inches
Beam 32 feet 3 inches
Depth 11 feet 3 inches
Propulsion Triple expansion inverted cylinder
Speed 11.5 knots
Capacity 32 crew


On 9 Apr 1940 HMAS Koala sailed for Darwin from Sydney, arriving there 20 days later. Following the first of the air raids on Darwin on 19 Feb 1942, she was transferred to Brisbane, returning to Darwin on 5 Jun 1942. She continued to perform boom defence duties until 30 Apr 1945.

Post World War II, she served in eastern and western Australian waters in addition to New Guinea waters, on harbour related tasks. On 8 Nov 1956 her sea going service ended in Sydney, after having steamed almost 80,000 nautical miles. Placed in Reserve on 18 Apr 1947, she was sold in 1969 for use as a gravel barge in Brisbane. During the flooding of the Brisbane River in 1974 she broke free of her moorings and severely damaged the Centenary Bridge where she was sunk.

Armament - Guns - 1 x 12 pounder 12 cwt in High Angle Mk IV mounting on aft boat deck; 1 x .303 Lewis Machine Gun; 1 x .303 Vickers Machine Gun; 2 x .30 inch Marlin Machine Gun.

Battle Honours

  • Darwin 1942-43

Crew members