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The General Bathymetric Chart of the Oceans (GEBCO) is a publicly available bathymetric chart of the world's oceans. The project was conceived with the aim of preparing a global series of charts showing the general shape of the seafloor. Over the years it has become a reference map of the bathymetry of the world's oceans for scientists and others.
Coordinates: 1]: Basin countries: List of bordering countries (not drainage basin), ports: Surface area: 85,133,000 km 2 (32,870,000 sq mi) [2] North Atlantic: 41,490,000 km 2 (16,020,000 sq mi), South Atlantic 40,270,000 km 2 (15,550,000 sq mi) [3]: Average depth: 3,646 m (11,962 ft) [3]: Max. depth: Puerto Rico Trench 8,376 m (27,480 ft) [4]: Water volume: 310,410,900 km 3 (74,471,500 cu mi ...
Bathymetric charts showcase depth using a series of lines and points at equal intervals, called depth contours or isobaths (a type of contour line). A closed shape with increasingly smaller shapes inside of it can indicate an ocean trench or a seamount, or underwater mountain, depending on whether the depths increase or decrease going inward.
The Flemish Cap is an area of shallow waters in the north Atlantic Ocean centered roughly at 47° north, 45° west or about 563 km (350 miles) east of St. John's, Newfoundland and Labrador. The shallow water is caused by a wide underwater plateau covering an extended area of 42,000 km 2 (12,000 square miles). Depths at the cap range from ...
The depth of the shelf also varies, ... North Atlantic Ocean 28 ± 1.08 259 115.7 ± 1.6 434 85 ± 1.14 434 North Pacific Ocean 39 ± 0.71 412 34.9 ± 1.2
On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points. Most charts include a compass rose depicting the variation between magnetic and true north. However, the use of the Mercator projection has drawbacks. This projection shows the lines of longitude as parallel.
Located roughly 76.0 miles (122.3 km; 66.0 nmi) north of the coast of the main island of Puerto Rico at Punto Palmas Altas in Manatí, [9] [10] the maximum depth of the Milwaukee Deep is 8,376 metres (27,480 ft; 4,580 fathoms), as directly measured by Vescovo during his 2018 descent to the deepest point of the Atlantic Ocean. [3] The maximum ...
By contrast, the Mid Atlantic Bight's depth generally increases with distance from shore, and is less deep than the Gulf of Maine. At most locations of the Mid Atlantic Bight that are closer to shore than 100 km (62 mi), the Mid Atlantic Bight is less than 100 m (330 ft), and has a maximum depth of 375 m (1,230 ft) at the most seaward locations ...