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The SOFAR channel (short for sound fixing and ranging channel), or deep sound channel (DSC), [1] is a horizontal layer of water in the ocean at which depth the speed of sound is at its minimum. The SOFAR channel acts as a waveguide for sound, and low frequency sound waves within the channel may travel thousands of miles before dissipating.
Hurd Deep running from bottom left to top right of an extract from a 1955 Admiralty Chart 1955 Admiralty Chart No 2649 showing Hurd Deep in the context of the English Channel. Hurd's Deep (or Hurd Deep) is an underwater valley in the English Channel, northwest of the Channel Islands. Its maximum depth is about 180 m (590 ft; 98 fathoms), making ...
A thalweg is the center of the principal navigable channel of the waterway (which is presumed to be the deepest part). [8] If there are multiple navigable channels in a river, the one principally used for downstream travel (likely having the strongest current) is used. [8] The definition has been used in specific descriptions as well.
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The English Channel, [a] [1] also known as the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France. It links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busiest shipping area in the world. [2]
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Both floods cut massive flood channels in the dry bed of the English Channel, somewhat like the Channeled Scablands or the Wabash River in the USA. A further update in 2017 attributed a series of previously described underwater holes in the Channel floor, "100m deep" and in places "several kilometres in diameter", to lake water plunging over a ...
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