Your local will affect cover escort selection, along with input from other users. On the basis of experience during World War Ithe Admiralty instituted trade convoys in United Kingdom coastal waters from September The WLEF was theoretically organized into eight escort groups  able to provide an escort of four to six ships to each convoy. The WLEF operated exclusively within range of anti-submarine patrol bombers; although weather often limited flight operations.
U-boats were deployed cautiously in areas where air patrols were expected, so single U-boat encounters were more common than wolf pack engagements.
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Battle of the St. Northern Mariner. Retrieved 24 June Blair, Clay Random House.
ISBN Gannon, Michael Black May. Harper Collins. Gretton, Peter Crisis Convoy.
Naval Institute Press. Hague, Arnold The Allied Convoy System — Lenton, H. Doubleday and Company.
Middlebrook, Martin William Morrow and Company. Milner, Marc North Atlantic Run. Morison, Samuel Eliot Little, Brown and Company.
Rohwer, J. Chronology of the War at Sea — ISBN X. Runyan, Timothy J. To Die Gallantly. Westview Press.
The Atlantic Campaign. Credit: see original file. Western Local Escort Force.
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