asdic

asdic — noun

1. a system or device fitted to a ship or submarine that sends sound pulses through

1.名詞C1
釋義

a system or device fitted to a ship or submarine that sends sound pulses through water and listens for the returning echoes to locate submerged objects such as submarines, wrecks, or underwater obstacles.

例句

The trawler's asdic picked up a large object on the seabed near the harbour entrance.

collocation: pick up (detect) + object

Vikram trained the crew to read the asdic display during the North Sea exercise.

同義詞
  • sonar

    Modern international term for the same technology; 'sonar' is far more common in general use, while 'asdic' is historically tied to British WWII naval terminology.

  • echo sounder

    A related device that measures water depth by sound reflection, but generally less sophisticated than a full asdic system designed for target detection.

文法句型

asdic + verb (detect/locate/find)

the/on + asdic

用法筆記

Frequently used with verbs like 'operate', 'switch on', 'detect', 'pick up'. The term is primarily historical British naval usage; the modern international equivalent is 'sonar'.

常見錯誤

❌The ship used asdic to talk to other ships.
✅The ship used asdic to detect underwater objects.
💡asdic is for detection, not communication.
❌I bought an asdic for fishing.
✅The research vessel was equipped with asdic for ocean-floor mapping.
💡asdic is a specialised military/scientific system, not a consumer device.