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Time-domain reflectometer for cable fault detection. A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected pulses.
The refitting was substantial and included installation of a new engine (30 Hp Bolinder hot bulb engine), electric generators (12/18V, 50A, and 110V, 2 kW; Titan, Copenhagen), electric winches for anchor and a 4000 m hydrographical wire (3.5 mm steel wire), radio (short wave radiotelegraph and MF radiotelephone), echosounder (Echometer, The ...
Illustration of echo sounding using a multibeam echosounder. The MTVZA sounder received from the Meteor M2-2 satellite by an amateur station. Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water ().
Rhodri Paul Gilbert [1] (born 18 October 1968) is a Welsh comedian and television and radio presenter who was nominated in 2005 for the Perrier Best Newcomer Award.In 2008 he was nominated for the main comedy award (as the Edinburgh Comedy Awards were then branded).
They break down into two broad categories; acoustic and non-acoustic. Acoustic systems in turn break down into active sonar systems and passive sonar systems designed to detect the acoustic signature of submarines such as SOSUS.
Minelayer Southern Prince was flagship of the first Minelaying Squadron. HMS Scott did much of the survey work to locate the Northern Barrage. The Northern Barrage was the name given to minefields laid by the British during World War II to restrict German access to the Atlantic Ocean.
In 1866, the United States Army Corps of Engineers established the Engineer School of Application at Willets Point, New York.The first commander of this school, Major Henry Larcom Abbot, was almost single-handedly responsible for designing and supervising the program of research and development that defined the strategy and tactics for the mine defense of American harbors.
The North Sea Mine Barrage, also known as the Northern Barrage, was a large minefield laid easterly from the Orkney Islands to Norway by the United States Navy (assisted by the Royal Navy) during World War I.