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The sonar mapping of the Challenger Deep was possible by its Simrad EM120 sonar multibeam bathymetry system for deep water. The sonar system uses phase and amplitude bottom detection, with an accuracy of better than 0.2% of water depth across the entire swath (implying that the depth figure is accurate to ± 22 metres (72 ft; 12 fathoms)). [18 ...
Cross section of an oceanic trench formed along an oceanic-oceanic convergent boundary The Peru–Chile Trench is located just left of the sharp line between the blue deep ocean (on the left) and the light blue continental shelf, along the west coast of South America.
River entrenchment causes negative impacts, such as accelerated stream bank erosion, land loss, loss of aquatic habitat, loss of land productivity, lowering of water table and sedimentation of the river downstream. However, in order to offset these problems, channel restoration measures focusing on restoration of the river in its original or to ...
After a competition was held in 2009 by Patricia Fryer, her doctoral student Sam Hulme, and Linda Tatreau to rename the HMRG Deep, [6] the new name of Sirena Deep was chosen. Students from Guam and the Northern Mariana Islands ages 18 and younger competed, [ 6 ] [ 7 ] with the winning name being suggested by Jermaine Sanders (aged 16) and John ...
Entrenchment, Entrenched or Entrench may refer to: A trench; Entrenchment (fortification), a type of fortification; Military trenches with relation to Trench warfare, especially that of World War I; An entrenchment clause within a constitution, a clause impervious to or somewhat shielded from the amendment process.
Milwaukee Deep, also known as the Milwaukee Depth, is the deepest part of the Puerto Rico Trench, constituting the deepest points in the Atlantic Ocean. [1] Together with the surrounding seabed area, known as Brownson Deep , the Milwaukee Deep forms an elongated depression that constitutes the floor of the trench.
Deep Silver is giving enticing but nebulous hints about its "Saints Row" franchise that have some speculating a new installment is in the works, after a tweet on Thursday. "Subscribe to the ...
British (upper) and German (lower) frontline trenches, 1916 German soldiers of the 11th Reserve Hussar Regiment fighting from a trench, on the Western Front, 1916 Plan of Ruapekapeka Pā 1846, an elaborate and heavily fortified Ngāpuhi innovation, which James Belich has argued laid the groundwork for or essentially invented modern trench warfare.