This image shows a screen shot of a sector view from a test of one of our diver detection sensors used in the SPS. Automatic detection tracks for 2 scuba divers are shown as red lines on top of the sector view. In this scenario, the two divers start together from nearly 500 meters range. At approximately 400 meters range, the two divers separate. Then their paths cross at about 250 meters range. They both approach to about 40 meters range before surfacing.
In this test, the sensor was deployed on a commercial pier with a small portion of the port side of the sector view shaded by the pier itself. Water depth in this area is 3-10 meters. In this picture, the sector view screen shot is shown as a manual overlay on a digital chart.