Milwaukee Deep

deepest part of the Atlantic Ocean – part of the Puerto Rico Trench

Coordinates: 19°35′00″N 66°30′00″W / 19.58333°N 66.5°W / 19.58333; -66.5

The Milwaukee Deep (also called the Milwaukee Depth), near Puerto Rico, is the deepest area in the Atlantic Ocean.[1] It is also the eighth deepest area in the ocean.[2] The depth of Milwaukee Deep is the 27,493 ft (8,380 m).[1][3] Milwaukee Deep is in the Puerto Rico Trench, where the Caribbean plate and the Atlantic Ocean plate meet together.[4] Milwaukee Deep is a part of the larger Brownson Deep which creates a very long depression.[5]

Milwaukee Deep is located in Caribbean
Milwaukee Deep
Milwaukee Deep
Where the Milwaukee Deep is at


The Milwaukee Deep is named after the ship USS Milwaukee,[3] which was named after the city Milwaukee, Wisconsin.[6] This ship was the first to discover the Milwaukee Deep on February 14, 1939. At the time it was read to be 28,680 feet.[7] This was found to be wrong in 2018 when Victor Vescovo dived down and found that it could not have been deeper than 27,493 ft.[8]

Related pagesEdit


  1. 1.0 1.1 Vaughan, T. Wayland; et al. (1940). "Chart I. - Major Ocean Basins with Depths Exceeding 4000 meters (I-XLV)" (PDF). Retrieved 2014-08-25.
  2. "10 Deepest Parts of the Ocean". Marine Insight. 4 November 2020. Retrieved 11 February 2022.
  3. 3.0 3.1 "deep-sea trench | geology | Britannica". Retrieved 11 February 2022.
  4. "Down in the Milwaukee Deep". OnMilwaukee. 26 December 2012. Retrieved 11 February 2022.
  5. Stewart, Heather Ann (October 2019). "The five deeps: The location and depth of the deepest place in each of the world's oceans". Earth-Science Reviews. 197:102896: 102896. Bibcode:2019ESRv..19702896S. doi:10.1016/j.earscirev.2019.102896 – via ResearchGate.
  6. "Milwaukee III (CL-5)". public1.nhhcaws.local. Retrieved 11 February 2022.
  7. Vaughn; et al. (1940). "Chapter II: The Earth and its Ocean Basins" (PDF). Retrieved 2014-08-25.
  8. "Atlantic Ocean". Five Deeps Expedition. Retrieved 11 February 2022.