a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
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asdic::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Synonyms | echo sounder, sonar |
| Type of | measuring device, measuring instrument, measuring system, navigational instrument |
asdic is an acronym for antisubmarine detection investigation committee.
Examples of asdic
asdic
The British tested their ASDIC on HMS Antrim in 1920, and started production in 1922.
From the en.wikipedia.org
Both the Royal Navy and the US Navy fitted their destroyers with ASDIC.
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Submarines were slow, and ASDIC sets did not operate effectively at speeds of over 20 knots.
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The later U-boats were covered in a sound-absorbent rubber coating to make them less of an ASDIC target.
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It featured a rubber coating, one layer of which contained circular air pockets to defeat ASDIC sonar.
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In 1928 a small escort ship was designed and plans made to arm trawlers and to mass produce ASDIC sets.
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The effectiveness of early ASDIC was hamstrung by the use of the depth charge as an anti-submarine weapon.
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Also see echo sounding and ASDIC.
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Developments during the war resulted in British ASDIC sets which used several different shapes of beam, continuously covering blind spots.
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This required an attacking vessel to pass over a submerged contact before dropping charges over the stern, resulting in a loss of ASDIC contact in the moments leading up to attack.
From the en.wikipedia.org
- Sonar: a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
- Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in Submarine navigation) to navigate, communicate with or detect other vessels. ...
- N. apparatus for locating submarines by measuring direction and time lag of echoes of sound waves reflected by their hulls.
