USS Milwaukee (CL-5) While steaming north of Hispaniola and Puerto Rico on 14 February 1939, "Milwaukee" discovered the deepest place in the Atlantic Ocean. The spot—which has a depth of —is now known as the "Milwaukee Deep". By January 1941, the ship had returned to Cruiser Division 2 which was now assigned to the Caribbean Patrol, commanded by Rear Admiral Jonas H. Ingram, part of the Neutrality Patrol established after the war began. Cruiser Division 2 was ordered to patrol the Atlantic between Trinidad, the Cape Verde Islands and the eastern bulge of Brazil in April, although "Milwaukee" was not immediately available. The
Deep sea community boiling by the high hydrostatic pressure) while within a few meters it may be back down to 2–4 °C. Salinity is constant throughout the depths of the deep sea. There are two notable exceptions to this rule: The deep sea, or deep layer, is the lowest layer in the ocean, existing below the thermocline, at a depth of 1000 fathoms (1800 m) or more. The deepest part of the deep sea is Mariana Trench located in the western North Pacific. It is also the deepest point of the earth's crust. It has a maximum depth of about 10.9 km which