The Milwaukee Deep (also called the Milwaukee Depth), near Puerto Rico, is the deepest area in the Atlantic Ocean. It is also the eighth deepest area in the ocean. The depth of Milwaukee Deep is the 27,493 ft (8,380 m). Milwaukee Deep is in the Puerto Rico Trench, where the Caribbean plate and the Atlantic Ocean plate meet together. Milwaukee Deep is a part of the larger Brownson Deep which creates a very long depression.
The Milwaukee Deep is named after the ship USS Milwaukee, which was named after the city Milwaukee, Wisconsin. 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. 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.
- Vaughan, T. Wayland; et al. (1940). "Chart I. - Major Ocean Basins with Depths Exceeding 4000 meters (I-XLV)" (PDF). earthguide.ucsd.edu. Retrieved 2014-08-25.
- "10 Deepest Parts of the Ocean". Marine Insight. 4 November 2020. Retrieved 11 February 2022.
- "deep-sea trench | geology | Britannica". www.britannica.com. Retrieved 11 February 2022.
- "Down in the Milwaukee Deep". OnMilwaukee. 26 December 2012. Retrieved 11 February 2022.
- 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.
- "Milwaukee III (CL-5)". public1.nhhcaws.local. Retrieved 11 February 2022.
- Vaughn; et al. (1940). "Chapter II: The Earth and its Ocean Basins" (PDF). earthguide.ucsd.edu. Retrieved 2014-08-25.
- "Atlantic Ocean". Five Deeps Expedition. Retrieved 11 February 2022.