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early sailings every 5th merged OA/OB convoy became an OG convoy at sea - later OG convoys sailed from Liverpool ON: Liverpool to Halifax Harbour: 26 July 1941 27 May 1945 307 replaced OB convoys for North American destinations - alternate convoys included slower ships until the ONS convoys started ONS: Liverpool to Halifax Harbour: 15 March 1943
This is a list of convoy codes used by the Allies during World War II There were over 300 convoy routes organized, in all areas of the world; each was designated by a two- or three letter code. List of Allied convoys during World War II by region provides additional information.
Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...
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Using the codes eases coordination and improves understanding during multiservice operations. The codes are intended for use by air, ground, sea, and space operations personnel at the tactical level. Code words that are followed by an asterisk (*) may differ in meaning from NATO usage. There is a key provided below to describe what personnel ...
SC 7 was the code name for a large Allied convoy in the Second World War comprising 35 merchant ships and six escorts, which sailed eastbound from Sydney, Nova Scotia, for Liverpool and other British ports on 5 October 1940. While crossing the Atlantic, the convoy was attacked by one of the first U-boat wolfpacks. The escorts were overwhelmed ...
Until April 1943, ships capable of speeds between 9 and 13 knots (17 and 24 km/h; 10 and 15 mph) were assigned to odd-numbered (fast) convoys—sometimes designated ON(F); while ships capable of speeds between 6 and 9 knots (11 and 17 km/h; 6.9 and 10.4 mph) were assigned to even-numbered (slow) convoys—sometimes designated ON(S) or (ambiguously) ONS.
OB 318 was a North Atlantic convoy which ran during the Battle of the Atlantic in World War II.During Operation Primrose Royal Navy convoy escorts HMS Bulldog, Broadway and Aubrietia captured U-110 with an intact Enigma machine and a wealth of signals intelligence, which led to the Allied breakthrough into cracking the German naval Enigma code.