ALS single-ping field of view and swath width: The ATLAS sonar is designed with a long detection and subsequently a wide swath width. As the vehicle traverses an area, objects which pass through the sensor’s field of view are seen dozens to hundreds of times. In contrast, side-looking sonars (SLS) tend to have narrow swaths and view an object from only a single aspect angle.
 Sonar Diagram
Image courtesy of Thunder Bay 2010 Expedition, NOAA-OER. Download larger version (jpg, 64 KB).

ALS single-ping field of view and swath width: The ATLAS sonar is designed with a long detection and subsequently a wide swath width. As the vehicle traverses an area, objects which pass through the sensor’s field of view are seen dozens to hundreds of times. In contrast, side-looking sonars (SLS) tend to have narrow swaths and view an object from only a single aspect angle.

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