Sidescan Sonar

The SFML operates two independent sidescan sonars: a "traditional" towed EdgeTech 260TH dual-frequency (100 & 500 KHz) system and Reson 7125 & 7111 SeaBat multibeam sonar-based systems. The EdgeTech sonar can generate very high resolution (10-20 cm) imagery throughout the continental shelf depth range (1-300 m), while the Reson systems performs best in depths <150 m. Data from both systems are displayed and recorded using a Triton Imaging, Inc Isis Sonar data acquisition system with optional real-time mosaic generation. Processing and mosaicking of backscatter data is accomplished using GeoCoder software (proprietary FPI). Sidescan sonar mosaics are interpreted and classified via visual and algorithmic methods to delineate and quantify substrate and habitat patch areas.