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A periscope is an instrument for observation over, around or through an object, ... The overall design of the classical submarine periscope is very simple: two ...
Also, "periscope feather" (the wave created by the snorkel or periscope moving through the water) can be spotted in calm seas. During the early months of the Battle of the Atlantic in World War II, British ships using the radar set Model 271 were able to detect the periscope of a submerged submarine at a distance of 800 m (0.50 mi) during tests ...
The Balaos incorporated the fairwater, conning tower and periscope shears reduction efforts that were being retrofitted to the Gatos and the preceding classes in the original design, refining the reductions and reducing the sail to the smallest practical size. By the time the boats began to be launched, lessons learned from patrol reports had ...
Periscope Sir Howard Grubb FRS FRAS (28 July 1844 – 16 September 1931) was an Irish optical engineer . He was head of a family firm that made large optical telescopes , telescope drive controls, and other optical instruments.
The Gato-class design, with a top range of 11,000 nautical miles (20,000 km), was a near-duplicate of the preceding Tambor- and Gar-class ships. The only significant differences were an increase in diving depth from 250 feet (76 m) to 300 feet (91 m), and an extra five feet in length to allow the addition of a watertight bulkhead dividing the ...
While its design was generally inspired by the first submarine commissioned by the US Navy, USS Holland, it deviated from the latter in at least three significant ways: by adding a periscope, by replacing the gasoline engine by a semidiesel engine (a hot-bulb engine primarily meant to be fueled by kerosene, later replaced by a true diesel ...
However, the diesel generator can be immediately loaded to 100% power output, despite design criteria cautions, at the discretion of the submarine commander on the recommendation of the submarine's engineer, if necessity dictates such actions to: (a) restore electrical power to the submarine, (b) prevent a reactor incident from occurring or ...
Periscope was an American live video streaming app for Android and iOS developed by Kayvon Beykpour and Joe Bernstein and acquired by Twitter, Inc. before its launch in March 2015. The service was discontinued on 31 March 2021 due to declining usage, product realignment, and high maintenance costs.