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Depth sounding. A sailor and a man on shore, both sounding the depth with a line. Depth sounding, often simply called sounding, is measuring the depth of a body of water. Data taken from soundings are used in bathymetry to make maps of the floor of a body of water, such as the seabed topography. Soundings were traditionally shown on nautical ...
Sunda Trench. Coordinates: 10°19′S 109°58′E. The Sunda Trench, earlier known as and sometimes still indicated as the Java Trench, [1] is an oceanic trench located in the Indian Ocean near Sumatra, formed where the Australian - Capricorn plates subduct under a part of the Eurasian Plate. It is 3,200 kilometres (2,000 mi) long with a ...
A bathymetric chart is a type of isarithmic map that depicts the submerged bathymetry and physiographic features of ocean and sea bottoms. [1] Their primary purpose is to provide detailed depth contours of ocean topography as well as provide the size, shape and distribution of underwater features. Topographic maps display elevation above ground ...
The Indian Ocean covers 70,560,000 km 2 (27,240,000 sq mi), including the Red Sea and the Persian Gulf but excluding the Southern Ocean, or 19.5% of the world's oceans; its volume is 264,000,000 km 3 (63,000,000 cu mi) or 19.8% of the world's oceans' volume; it has an average depth of 3,741 m (12,274 ft) and a maximum depth of 7,290 m (23,920 ft).
A nautical chart or hydrographic chart is a graphic representation of a sea region or water body and adjacent coasts or banks. Depending on the scale of the chart, it may show depths of water (bathymetry) and heights of land (topography), natural features of the seabed, details of the coastline, navigational hazards, locations of natural and ...
Challenger ' s discovery of this depth was a key finding of the expedition in broadening oceanographic knowledge about the ocean's depth and extent; the depression, the Challenger Deep, now bears the name of the vessel and its successor, HMS Challenger II, which in 1951 identified a depth of 5,944 fathoms nearby. [19]
In 1899, Egeria carried out soundings for a proposed telegraph cable in the north Pacific between Vancouver and Hawaii. 166 soundings were carried out in depths up to 3,407 fathoms (6,231 m). Somerville wrote the report of the sounding cruise. In 1900 he joined HMS Triton spending two seasons in home waters.
Coordinates: 35°S 104°E. Diamantina Fracture Zone marked in red. The Diamantina Fracture Zone (DFZ, Diamantina Zone) [1][2][3] is an area of the south-eastern Indian Ocean seafloor, consisting of a range of ridges and trenches. [4] It lies to the south of the mideastern Indian Ocean features of the Wharton Basin and Perth Basin, and to the ...