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Falmouth Scientific, Inc. (FSI)
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FSI - Model HMS-665 -Multi-Sonar Deep Tow System

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The HMS-665 Multi-Sonar Tow System is designed for applications that require high resolution side scan and sub-bottom imagery in depths of up to 3,000m. This combined side scan and sub-bottom survey tool offers a fully digital platform capable of collecting high resolution Klein powered side scan with FSI HMS-621 sub-bottom data, as well as a range of customer selected sensor data. The long range, high resolution side scan and sub-bottom CHIRP data along with the ancillary sensor capability provide the surveyor with a cost effective solution over multiple system and sensor surveys resulting in savings in both instrument cost and survey time.

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Deep Tow Sub-bottom Profiling Combined with
Klein Powered Side Scan Sonar
Fully Integrated, Cost-effective, Compact Solution

Single Workstation

  • Klein powered side scan sonar, operating at 100/400 KHz simultaneously, allows 1,200 meter or greater swath, with resolution equivalent to much higher frequency systems at longer ranges.
  • FSI HMS-621 CHIRP/CW based sub-bottom profiler, operating in the 1 to 10 KHz region, allows for extended sediment penetration with greatly improved resolution over conventional CW systems.
  • Range, Gain, TVG, Pulse Width, and other programmable parameters are under user friendly software GUI control.
  • Integrated CHIRPceiver True 24-bit data acquisition.>110 dB dynamic range.

Rugged Tow System

  • A fully integrated digital platform with high performance CHIRP side scan and sub-bottom transducer arrays, digital multiplexor, subsea electronics, and RS-232 and power ports for optional sensors.
  • Ruggedized, stable tow vehicle includes pitch, roll and heading sensors, optional position responder / transponder, plus other customer selected sensors.
  • Broadband CHIRP match filter processing, combined with a narrow side scan sonar horizontal radiation pattern provides optimal cross-track and along track resolution.
  • Horizontal beam width of 1° at 100 KHz and .3° at 400 KHz
  • Tow System will operate in depths up to 2,000 meters and more (3000m-6,000m versions available) with low-maintenance construction