Definition

1. Noun:
   • A type of sonar device: "asdic" refers to a specific type of underwater detection system that uses sound pulses to locate objects, particularly submarines, by measuring the time it takes for an echo to return.

Usage

• Noun:
  • The naval vessel used its asdic to search for enemy submarines.
  • Early asdic technology was crucial during World War II for anti-submarine warfare.

Advanced Usage

• Technical Context: In historical or technical discussions, "asdic" is often used synonymously with early active sonar systems, specifically those developed for military use.
  • The development of the asdic system marked a significant advancement in naval warfare.

Variants and Related Words

• Sonar (n): A broader term for navigation and ranging using sound. "Asdic" is a specific type of sonar system.
  • Modern sonar is far more advanced than the original asdic equipment.

Synonyms

• Echo sounder: A device that determines depth by measuring the time for an echo.
• Active sonar: A sonar system that emits pulses of sound and listens for echoes.

Notes on Meaning

• Acronym: The word "asdic" is an acronym for "Anti-Submarine Detection Investigation Committee," the British group associated with its development. It is often used interchangeably with "sonar," though it specifically refers to the early anti-submarine technology.

Noun

1. 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