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Asdic was the British version of sonar developed at the end of World War I based on the work of French physicist Paul Langevin and Russian engineer M. Constantin Chilowsky. The system was developed as a means to detect and locate submarines by their reflection of sound waves.
The Maltese sound mirror is known locally as "the ear" . The Dungeness mirrors, known colloquially as the "listening ears", consist of three large concrete reflectors built in the 1920s–1930s.
The US Army also used sound locators. [14] US Army sound ranging units took part in nearly all battles in which the army participated after November 1942. By the end of the war there were 25 observation battalions with 13,000 men. [15] During the Okinawa campaign, the US Army used its sound ranging sets to provide effective counter battery fire ...
Acoustic wayfinding, the practice of using auditory cues and sound markers to navigate indoor and outdoor spaces; Animal echolocation, animals emitting sound and listening to the echo in order to locate objects or navigate; Echo sounding, listening to the echo of sound pulses to measure the distance to the bottom of the sea, a special case of sonar
Geophysical MASINT is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances.
The school was formed on 1 April 2004 as the Defence College of Communications and Information Systems to deliver coherent and cost-effective training across defence. In 2012, it joined three other technical training colleges under a combined organisation, the Defence College of Technical Training, and reverted in title to being a Defence School.
The Royal School of Military Survey (RSMS) originates from 1833 when it was established at the Royal Military Academy, Woolwich as a survey training branch. After a period of stability the school moved to a number of locations including Chatham, Fort Southwick, Ruabon and Longleat before finally settling at Hermitage, Berkshire in early 1949, when it was renamed the School of Military Survey.
Independent regional campuses, such as Indiana University Kokomo, are included. Indiana has several universities that meet the definition of a flagship institution, with the most commonly cited being Indiana University Bloomington and Purdue University. The Indiana state code designates the Indiana University System as the university of the ...