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Submetrix Interferometric System (SI)

The Submetrix Interferometric System collects swath bathymetry and sidescan sonar from a hull-mounted transducer (as seen in the figure). Horizontal and vertical accuracy, when coupled with RTK-GPS and a motion sensor is 5-10 cm. Unlike traditional multi-beam systems, the SI maintains a swath width of 8-10 times the water depth and simultaneously collects both depth and seabed reflection properties. This system performs particularly well in shallow waters, ranging from 2-20 meters, and is being used to document the evolution of the ebb tidal delta area as shown in the figure below. The data are typically gridded at 30 feet (10 meter) spacing, however, 10 foot (3 meter) gridding is possible. A sample of the coverage obtained in the area of the ebb tide delta is shown in the bottom figure.

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