Location: body of water between the Western Hemisphere and Europe/Africa

note: includes Baltic Sea, Black Sea, Caribbean Sea, Davis Strait, Denmark Strait, Drake Passage, Gulf of Mexico, Mediterranean Sea, North Sea, Norwegian Sea, Weddell Sea, and other tributary water bodies

Coastline: 111,866 km

International disputes: some maritime disputes (see littoral states)

Climate: tropical cyclones (hurricanes) develop off the coast of Africa near Cape Verde and move westward into the Caribbean Sea; hurricanes can occur from May to December, but are most frequent from August to November

Terrain: surface usually covered with sea ice in Labrador Sea, Denmark Strait, and Baltic Sea from October to June; clockwise warm water gyre (broad, circular system of currents) in the north Atlantic, counterclockwise warm water gyre in the south Atlantic; the ocean floor is dominated by the Mid-Atlantic Ridge, a rugged north-south centerline for the entire Atlantic basin; maximum depth is 8,605 meters in the Puerto Rico Trench

Natural resources: oil and gas fields, fish, marine mammals (seals and whales), sand and gravel aggregates, placer deposits, polymetallic nodules, precious stones

Environment: endangered marine species include the manatee, seals, sea lions, turtles, and whales; municipal sludge pollution off eastern US, southern Brazil, and eastern Argentina; oil pollution in Caribbean Sea, Gulf of Mexico, Lake Maracaibo, Mediterranean Sea, and North Sea; industrial waste and municipal sewage pollution in Baltic Sea, North Sea, and Mediterranean Sea; icebergs common in Davis Strait, Denmark Strait, and the northwestern Atlantic from February to August and have been spotted as far south as Bermuda and the Madeira Islands; icebergs from Antarctica occur in the extreme southern Atlantic

Note: ships subject to superstructure icing in extreme north Atlantic from October to May and extreme south Atlantic from May to October; persistent fog can be a hazard to shipping from May to September; major choke points include the Dardanelles, Strait of Gibraltar, access to the Panama and Suez Canals; strategic straits include the Dover Strait, Straits of Florida, Mona Passage, The Sound (Oresund), and Windward Passage; north Atlantic shipping lanes subject to icebergs from February to August; the Equator divides the Atlantic Ocean into the North Atlantic Ocean and South Atlantic Ocean