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The British Spearfish torpedo, designed to counter high-speed Russian submarines such as the Alfa class, is reputed to reach speeds in excess of 70 knots (130 km/h; 81 mph). The Russian VA-111 Shkval rocket-powered supercavitating torpedo is reportedly capable of speeds over 200 knots (370 km/h; 230 mph). [ 6 ]
The limited energy stored in electric batteries means that even the most advanced conventional submarine can remain submerged for only a few days at slow speed, and only a few hours at top speed, though recent advances in air-independent propulsion have somewhat ameliorated this disadvantage. The high cost of nuclear technology means that ...
Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984. A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) [1] is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of 100 km/h (30 m/s; 60 mph) but is capable of reaching speeds up to ...
USS Reuben James (DD-245) was a four-funnel Clemson-class destroyer that was constructed after World War I.She was the first United States Navy ship to be named after Boatswain's Mate Reuben James (.c. 1776–1838), who had distinguished himself fighting in the First Barbary War, and was the first US ship to be sunk by hostile action in the European Theater of World War II.
The Battle of Marathon, an example of the double-envelopment, a form of flanking maneuver. In military tactics, a flanking maneuver is a movement of an armed force around an enemy force's side, or flank, to achieve an advantageous position over it. [1]
The first USS Trepang (SS/AGSS-412) was a Balao-class submarine in the United States Navy.She was named after the trepang (or trīpang), an Indonesian name for a marine animal called a "sea slug" or a "sea cucumber," having a long, tough, muscular body and found in the coral reefs of the East Indies.
Warship types are listed in a subjective order of importance, which is generally related to size. An exception to this is the submarine, which is now highly regarded, despite tending to be smaller than many surface ships. Type designation is done by the individual navies. This is imperfect, and can be the subject of spirited discussion.
This loss of a second boiler, combined with fuel losses and increasing bow trim, forced the ship to slow to 16 knots (30 km/h; 18 mph). Divers repaired the collision mats in the bow, after which speed increased to 20 knots (37 km/h; 23 mph), the speed that the command staff determined was the most economical for the voyage to occupied France.