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A U.S. Navy Bell XHSL-1 (Bell Model 61) prototype in flight, the first USN helicopter fitted with a dipping sonar. Circa 1953.

Method or device that uses the reflection of sound waves to detect and locate objects

Pages in category "Sonar"

The following 2 pages are in this category, out of 2 total.

Media in category "Sonar"

This category contains only the following file.