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Milwaukee Deep


Milwaukee Deep, also known as The Milwaukee Depth, (19°35′N 66°30′W / 19.583°N 66.500°W / 19.583; -66.500) is the deepest part of the Atlantic Ocean and is part of the Puerto Rico Trench. It has a maximum depth of at least 27,493 feet (8,380 m). It is just 76.0 miles (122.3 km) north of the coast of Puerto Rico at Punto Palmas Altas in Manatí.

This ocean floor feature is named for the USS Milwaukee (CL-5), a U.S. Navy Omaha class cruiser, which discovered the Milwaukee Deep on February 14, 1939 with a reading of 28,680 feet (8,740 m).

On August 19, 1952, the U.S. Fish and Wildlife vessel Theodore N. Gill obtained a reading of 28,560 feet (8,710 m) at (19°36′N 68°19′W / 19.600°N 68.317°W / 19.600; -68.317), virtually identical with the Milwaukee's reading.

The existence of deep water to the Atlantic Ocean side of the Caribbean has been known for more than a century. One of the area's earliest soundings was obtained June 12, 1852 by Lt. S. P. Lee, U.S. Navy brig Dolphin, with a reading of 22,950 feet (7,000 m) at (26°32′N 60°06′W / 26.533°N 60.100°W / 26.533; -60.100).


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