Increasing number of enemy submarines off the North American Atlantic coast according to the U.S. Joint Intelligence Committee. Daily summary dated 28 May 1942

An item reported that the number of enemy submarine active off the North American West or Atlantic coast decreased in contrary to the number in the west part off the ocean south of the Florida Straits. Estimated positions on 27 May west of the longitude of the Azores (Portuguese) were: 3 (including one eastbound) between Halifax (Nova Scotia, Canada) and Cape Cod, 5 between Cape Cod and Cape Lookout (including the one around 400 miles of the coast), between Cape Lookout (North Carolina, USA) and the Florida Straits were none submarines active, in the Florida Straits just one, in the Gulf of Mexico 2 (of which 1 off the Mississippi Delta and the second one eastbound), in the Caribbean (5 east and 3 west part), of the Brazilian north coast 3 (including 2 still westbound), 6 were moving between the latitudes of Cape Race (Newfoundland, Canada) and Cape Cod (Massachusetts, USA) of which 4 to east and to the 2), 10 between the latitudes of Cape Cod and Miami ( 7 to the east, 3 to the west), 1 eastbound further to the south, 1 patrolling westward of the Cape Verde Islands (Portuguese) , totally 40 submarines (including the 14 bound for the east and 7 to the west).

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 169 dated 28 May 1942