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851 Naval Air Squadron
File:A winged mace in a circle of rope
Active 1943-1945
1954-1984 as 851 Squadron RAN
Country UK
Branch Royal Navy, Fleet Air Arm
Type Carrier based squadron
Role Torpedo bomber reconnaissance
Anniversaries none
Engagements Sinking of U-198, Operation Dracula

851 Naval Air Squadron was a Fleet Air Arm squadron of the Royal Navy, first formed in October 1943 at Squantum Naval Air Station in Massachusetts, United States as a MAC-ship escort squadron. It was later disbanded around December 1945.

It was reformed in 1954 as an Australian squadron on 3 August 1954.


After pilot training the squadron was formed in October 1943, equipped with Grumman Avenger IIs to operate as a torpedo bomber reconnaissance and escort squadron. As a squadron they flew their 12 Avengers to the west coast of the USA and embarked on HMS Shah at Alameda in January 1944, where a Wildcat fighter flight was added. They sailed to the Indian Ocean via Williamstown docks, Australia to Cochin, where the carrier's deck cargo of aircraft was unloaded, thus enabling 851 Squadron's naval flying operations for the first time. Tasked with anti-submarine patrols in the Indian Ocean and Bay of Bengal, 851 Squadron's Avengers and Wildcat flights briefly operated from a shore base at Colombo Racecourse, then at Katukurunda, as well as forming the Shah's full complement.

Sinking of U-198

The two carriers HMS Shah and HMS Begum (carrying 832 Squadron) formed the hunter-killer group Force 66 in July 1944, searching for U-198. On 10 and 12 August 1944 the U-boat was located near the Seychelles and attacked by 851's Avengers, although damage could not be clearly ascertained. The aircraft directed the RN frigate HMS Findhorn and the Indian sloop HMIS Godavari to the submarine and they were able to sink U-198 with the loss of all hands.

Sinking of the Haguro

In February 1945 the Shah sailed to Durban for a refit, and the Wildcats were withdrawn. Sailing to Burma in May 1945, the Shah with 851 Squadron's Avengers supported Operation Dracula, the invasion of Rangoon. 851 Squadron dive-bombed the Japanese heavy cruiser Haguro, suffering losses in the attacks for little return. However they directed ships of the 26th Destroyer Flotilla which sank the Haguro in a night torpedo action known as "Operation Dukedom".


The squadron subsequently returned to Katukurunda, Colombo Racecourse and Trincomalee. After VJ-Day the squadron left their aircraft and sailed on HMS Shah to the UK where the squadron was disbanded and the carrier returned to the USA.

851 Squadron was subsequently reactivated as a squadron of the Royal Australian Navy.


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