Abstract: An acoustic sensing countermeasure device is used to sense the direction of a threat projectile or vehicle in addition to countering the threat with noise or interference signals. Countermeasure device includes an acoustic receive array comprised of segmented vertical slaves preferably mounted within a reduced diameter section around the outside housing of the countermeasure device. The staves are grouped to form directional acoustic beams across the entire horizontal plane. To determine the direction of the acoustic signals from the threat projectile of vehicle, the countermeasure device uses a method wherein the direction is indicated by the output of the directional acoustic beams. The countermeasure device locates a known reference direction used to determine the bearing of the threat. The bearing information can be transmitted, for example, it the vessel that deployed the countermeasure. In the example, the countermeasure includes a compass and the compass heading of North is used as the reference direction. Alternatively, countermeasure device can detect the vessel or another countermeasure device and use that as the reference direction.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Patent application, filed 28 Feb 2000 |
| Pages: |
15 |
| Report Date: |
28 FEB 2000 |
| Report Number: |
D429910 |
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Keywords relating to this report:
