"Imagenex Delta T 837B 120 x 20 degrees (profiling) multibeam echosounder"@en . . "SDN:L22::TOOL1347" . "A multibeam (swath) echosounder with video-imaging capability that operates with a 120 x 20 degrees field of view. The Delta T is designed for low power consumption without a surface control box enabling it to be integrated into ROV and AUV systems. The sensor uses a 260 kHz acoustic frequency to measure the depth and nature of the sea floor. Operates with 120, 240 or 480 beams (3, 1.5 or 0.75 degree beam widths). Sensor is fitted with stainless steel housing as standard; or an optional 675 kHz acoustic frequency. Resolution is 0.02% of the range. Operting depth is 300 m. Can be combined with an azimuth drive to obtain readings from direction."@en . .