Operation Transom

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Operation Transom
Part of World War Two
Carrier strike on Surabaya, Java in May 1944.jpg
Strike photo taken during the attack by carrier planes.
Type Offensive bombing raids
Location Sourabaya, Java
7°12′40″S 112°43′49″E / 7.211035°S 112.730260°E / -7.211035; 112.730260Coordinates: 7°12′40″S 112°43′49″E / 7.211035°S 112.730260°E / -7.211035; 112.730260
Commanded by Admiral James Somerville, United Kingdom
Target Surabaya Harbor
Wonokromo refineries
Executed by

 United States

 United Kingdom

Casualties None

Operation Transom was a major bombing raid on Japanese targets at Surabaya, Java by American and British planes on 17 May 1944 during World War II.


Transom was the second of two raids—Operation Cockpit (against Sumatra) being the first—that marked the first major offensive raids by the British Fleet Air Arm in the Far East. The Royal Navy was building its naval strength in the Indian Ocean, in preparation for joining the war in the Pacific (see British Pacific Fleet). Transom therefore also served to provide experience in naval air raids and replenishment at sea. Planes from the aircraft carrier USS Saratoga also took part in the raids on Sumatra and Java, after a joint training exercise with the British ships.

In addition, seven land-based B-24 heavy bombers of the 380th Bombardment Group, U.S. Army Air Forces, made a follow-up night attack on Surabaya Harbor, from their base at Corunna Downs Airfield, in Western Australia.[1]

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