sonic depth finder การใช้

• In October 1922, USS " Corry " was fitted with a Hayes Sonic Depth Finder for testing.
• She joined in fleet maneuvers, cruises from Alaska to the Caribbean, development and tests of sonic depth finders, antiaircraft gunnery, aircraft rescue and plane guard rehearsals.
• 6 : 40 p . m . _ Sonic depth finder dropped from Russia's Peter the Great warship confirms location of Kursk, Defense Minister Sergeyev says later in a September interview.
• The equipment included a fathometer, a Dorsey sonic depth finder, a Hughes automatic depth recorder system, a special taut-wire measuring gear with 120 nautical miles ( 138 statute miles; 222 km ) of fine wire and several tons of iron balls, and hydrophones.