sofar bomb

/S OW0 F AA1 R B AA0 M/
noun
  1. 1

    (nautical, military) A device (usually an imploding metal sphere or an explosive charge fuzed to explode at depth) which sinks in the ocean and creates a loud, low-frequency sound when it enters the sofar channel; used to determine the location of sunken vessels.

  2. 2

    Alternative letter-case form of sofar bomb. [(nautical, military) A device (usually an imploding metal sphere or an explosive charge fuzed to explode at depth) which sinks in the ocean and creates a loud, low-frequency sound when it enters the sofar channel; used to determine the location of sunken vessels.]