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LCSonar

Shark-S75T Deep Water Side Scan Sonar

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The Shark-S75T Deep-Water Triple-Frequency Side Scan Sonar is a high-performance seabed imaging system specifically engineered for ultra-deep-water and wide-area survey operations. Operating with triple-frequency combinations of 75 kHz, 225 kHz, and 750 kHz, the system supports both LFM (CHIRP) and CW transmission modes, allowing users to optimize survey performance for long-range coverage or ultra-high-resolution imaging. The low-frequency channel enables extended swath coverage up to 600 m, while the higher frequencies provide enhanced image sharpness and precise target definition with a narrow horizontal beamwidth of up to 0.2°.

The sonar is integrated into a high-pressure-resistant 316L stainless-steel towfish, rated for 2000 m water depth and customizable up to 6000 m, making it suitable for demanding offshore environments. The towfish incorporates a built-in single-beam echosounder for accurate bottom tracking, along with attitude, heading, and pressure sensors to ensure stable operation and consistent data quality. Supplied with proprietary OTech sonar software, the Shark-S75T supports real-time mosaicking, live online mapping, survey planning, data recording and playback, target management, continuous raw data output, and standard XTF format compatibility with third-party processing software. Optional SDK support enables advanced integrations such as AI-based automatic target recognition and custom data workflows.

Key Features:

  • Triple-frequency operation: 75 kHz / 225 kHz and 225 kHz / 750 kHz frequency combinations
  • Transmission modes: Linear Frequency Modulated (LFM) CHIRP and Continuous Wave (CW)
  • Wide-area to ultra-high-resolution imaging capability through low- and high-frequency combination
  • Maximum Operating Range (per side): up to 600 m at 75 kHz, 300 m at 225 kHz, and 90 m at 750 kHz (environment dependent)
  • Horizontal Beamwidth: 1.0° at 75 kHz, 0.3° at 225 kHz, and 0.2° at 750 kHz
  • Across-track Resolution: 5 cm at 75 kHz, 2.5 cm at 225 kHz, and 1.25 cm at 750 kHz
  • Along-track Resolution: 0.18h at 75 kHz, 0.005h at 225 kHz, and 0.003h at 750 kHz (h refers towfish height above the seabed)
  • Vertical Beam Center: default 20°, with optional downward tilt of 10° and 15°
  • Vertical Beamwidth: 50°
  • Maximum Depth Rating: 2000 m (customizable up to 6000 m)
  • Standard Towfish Sensors: Singlebeam echosounder, Heading, Roll, Pitch, Pressure
  • Towfish Size / Weight: 1464 mm x 105 mm (length x diameter) / 45 kg
  • Power consumption: 110/220 VAC, 60 W

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