sonar ww2 definition

Sonar, technique for detecting and determining the distance and direction of underwater objects by acoustic means. Active sonar is mainly used for under ice operations. From the 1960s to the 1990s, Transit satellites and LORAN shore stations provided those signals.

The majority of the sonar used aboard submarines is passive, since active emissions give away a vessel's position. They assist in safe navigation and aid in search, rescue and attack operations. The sonar operator may also be ordered to report a target's true bearing. GPS has now replaced both. It is an acronym for SOund, NAvigation, and Ranging.

Two similar but different technological advances that figured prominently in the Allied victory in World War II were radar and sonar, both techniques for detecting the location and speed of enemy aircraft or submarines.

Radar - Radar - Advances during World War II: The opening of higher frequencies (those of the microwave region) to radar, with its attendant advantages, came about in late 1939 when the cavity magnetron oscillator was invented by British physicists at the University of Birmingham. STs are responsible for underwater surveillance. Surfaced submarines entering and leaving port navigate similarly to traditional ships but with a few extra considerations because most of the ship rides below the waterline, making them hard for other ships to see and identify. Imagine two lines drawn from the center of the submarine: the first to the North Pole, the second to the target. The result is a firing solution used to launch and guide torpedoes to their intended target(s). The word Sonar is an American term first used in World War II.

Sonar technicians are separated into two categories, STG (sonar technician surface) who are on surface ships and STS (sonar technician submarine) who operate on Sonar technicians, surface fleet (manipulate, control, evaluate, and interpret data) surface Sonar technician submarines operate (control, evaluate, and interpret data) submarine sonar, oceanographic equipment and submarine auxiliary sonar; coordinate submarine sonar and underwater interface; perform organizational and intermediate maintenance on submarine and allied equipment. Sonar technician (abbreviated as ST) is a United States Navy occupational rating. Hertz set out to verify experimentally the earlier theoretical work of Scottish physicist James Clerk Maxwell. They operate and repair sonar equipment. Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track, and deter, damage, or destroy enemy submarines.. To maintain accuracy, the submarine must periodically update its position using outside navigational radio signals. They assist in safe navigation and aid in search, rescue and attack operations. They operate and repair sonar equipment. Submarines carry an inertial navigation system, which measures the boat’s motion and constantly updates position. Submarine navigation underwater requires special skills and technologies not needed by surface ships.The challenges of underwater navigation have become more important as submarines spend more time underwater, travelling greater distances and at higher speed. Because it does not rely on radio signals or celestial sightings, it allows the boat to navigate while remaining hidden under the surface. At depths below periscope depth submarines determine their position using: The British also call Sonar "ASDICS," which stands for Anti-Submarine Detection Investigation Committee. STs are responsible for underwater surveillance. Successful anti-submarine warfare depends on a mix of sensor and weapon technology, training, and experience. Sound waves emitted by or reflected from the object are detected by sonar apparatus and analyzed for the information they contain. Asdic definition: → sonar | Meaning, pronunciation, translations and examples