Multi-function Towed Arrays for U.S. Navy25/06/2008 |
| Lockheed Martin received a USD10 million contract to produce and support Multi-Function Towed Arrays (MFTAs) for the U.S. Navy's AN/SQQ-89 Antisubmarine Warfare Combat System. The MFTA is the next generation passive and active sonar receiver configured as a long three inch diameter array that can be towed behind surface ships. |
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Hydrographic Survey of Riverbed Erosion |
Members of the US Geological Survey were filmed while out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyses the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed.
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