rrents) 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

- Economy
Overview: Economic activity is limited to exploitation of natural
resources, especially fish, dredging aragonite sands (The Bahamas), and
crude oil and natural gas production (Caribbean Sea and North Sea).

- Communications
Ports: Alexandria (Egypt), Algiers (Algeria), Antwerp (Belgium),
Barcelona (Spain), Buenos Aires (Argentina), Casablanca (Morocco),
Colon (Panama), Copenhagen (Denmark), Dakar (Senegal), Gdansk (Poland),
Hamburg (FRG), Helsinki (Finland), Las Palmas (Canary Islands, Spain),
Le Havre (France), Leningrad (USSR), Lisbon (Portugal), London (UK),
Marseille (France), Montevideo (Uruguay), Montreal (Canada), Naples (Italy),
New Orleans (US), New York (US), Oran (Algeria), Oslo (Norway),
Piraeus (Greece), Rio de Janeiro (Brazil), Rotterdam (Netherlands),
Stockholm (Sweden)

Telecom