![]() ![]() Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. "Sonar" can refer to one of two types of technology: passive sonar means listening for the sound made by vessels active sonar means emitting pulses of sounds and listening for echoes. Sonar ( sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. Sonar image of the Soviet Navy minesweeper T-297, formerly the Latvian Virsaitis, which was shipwrecked on 3 December 1941 in the Gulf of Finland Not to be confused with Sodar or Sonnar.įrench F70 type frigates (here, La Motte-Picquet) are fitted with VDS (Variable Depth Sonar) type DUBV43 or DUBV43C towed sonars. For other uses, see Sonar (disambiguation). ![]()
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