sonar target การใช้

• Several side scan sonar targets are interpreted as scattered small debris.
• "Grampus " sank on the 18th September 1980 in Loch Fyne as she was being towed as a sonar target.
• "Rubis " was struck on 4 October 1949, and was sunk on 31 January 1958 to be used as a sonar target.
• The Navy's remote-controlled vehicle, manufactured by Benthos Inc . of Falmouth, made it possible to explore likely sonar targets easier and faster.
• When mixed with seawater, the calcium hydride produced large quantities of hydrogen which bubbled out of the container, creating a false sonar target.
• Sending down divers to investigate every suspicious sonar target has been the procedure for the last two days, said a Coast Guard spokeswoman, Petty Officer Bridget Hieronymus.
• Saturday, Navy salvage workers counted nearly 400 sonar targets yet to be examined on the floor of the Atlantic, not counting some newly detected, buried objects that could also be wreckage.
• The box-like vehicle, operated from the surface and equipped with propellers, lights, cameras, sonar, and a robotic arm, was sent down late Tuesday night off Martha's Vineyard to investigate a sonar target.
• But if the plane is intact, or in a few large pieces, " it should make an excellent sonar target, " said Clifford Goudey, a marine engineer at the Massachusetts Institute of Technology.
• "We are hopeful that if the weather holds up, we will have dived on all side-scan sonar targets by the end of the week, " said Rear Adm . Edward K . Kristensen.
• Hopes were high that this sonar target suggested that " Kalev " had been found and that the presumption that she sank as a result of hitting a mine near Cape Juminda was correct.
• Simmons continued to study sonar ranging performance in echolocating bats, and in the late 1970s, he introduced a new behavioral task, requiring the bat to discriminate a sonar target returning echoes at a fixed delay from one returning echoes that alternated between two delays.
• Decommissioned by the Royal Navy in May 1944 she was returned to the United States Navy in December 1944, " S-24 " was struck from the Navy List and was intentionally sunk in the Pacific Ocean off Portland, Oregon, as a sonar target on 25 August 1947.
• So in the next few days, divers with advanced military equipment normally used to find underwater mines should descend on the new sonar targets, walk along the sea floor waving the hand-held detectors, and listen for a rising squeal in their earphones indicating the presence of buried metal.
• Returned to the United States Navy at Philadelphia, Pennsylvania, on 11 July 1944, " S-22 " was subsequently used as a sonar target at New London and in tests at the U . S . Naval Experimental Facility, Minas Basin, Nova Scotia, Her name was struck from the Naval Vessel Register in August 1945.