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Side-Scan Sonar, PulSAR

PulSAR Side-Scan Sonar
PulSAR Side-Scan Sonar towfish, deck unit and hand reel.

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PulSAR Side-Scan Sonar acquires high resolution acoustic images of the seabed by using a rugged tow fish that can easily be operated using our water protected deck unit and a small cable hand reel, portable electric winch also available.

Very large areas can be surveyed efficiently revealing small objects and structures in great detail. The system is ideal for search and recovery operations, underwater inspection as well as engineering and scientific surveys.

PulSAR software interface. Hold the mouse pointer over the image to view details.

Features

  • Portable and rugged towfish
  • Easy deployment and intuitive operation
  • Compact and water protected deck unit (IP 66)
  • Frequency 550 kHz - 1000 kHz
  • Wide bandwidth FM and CW pulses
  • Integrated GPS module
  • Tow cable on hand reel and deck cable
  • Dedicated Acquisition and processing software

Applications

  • Search and Recovery (SAR)
    • Debris detection and identification
    • Search for victims of drowning
    • Search for submerged evidence
  • Inspection and Engineering
  • Underwater Archaeology
    • Non-intrusive
    • Effective large area surveys
    • Geo-referenced imaging
  • Marine Geology and Geophysics

System Components

Towfish

  • Stainless steel
  • 9 cm D x 110 cm L, 16.5 kg

Deck unit

  • Water protected IP66
  • 30 cm W x 20 cm D x 8.5 cm H, 5 kg
  • 24 VDC or 110 / 220 VAC

Hand reel and tow cable

  • 100 m soft tow cable
  • Optional up to 300 m soft tow or armoured
Electric winch
Portable electric winch for towed side scan systems.

Software

  • Survey planning
  • Online display
  • Data acquisition and post processing

Optional extra

Our Portable Electric Winch is specifically designed for deployment of towed side scan systems on small vessels. The robust stainless steel construction carries up to 300 m tow cable. It is powered by a joystick controlled, variable speed 24 VDC motor. The side scan sonar deck cable connects via maintenance free slip rings.

Frequency range

The side scan sonar operates in a frequency range of 550 kHz to 1 MHz. Within this bandwidth source signals, both FM and CW, can be selected in order to optimise the range and resolution for the given survey task.

Towfish

The set-up comprises a compact stainless steel towfish, which is towed using a 100 m long soft tow cable. The cable can be paid out from a compact hand reel, which uses slip rings so that it stays connected to the deck unit via a dedicated deck cable during operation. Optionally various soft tow and armoured cables, up to 300 m length, are available. The deck unit has been designed for use on small vessels like open RIBs and is water protected (IP66) and can be battery or mains powered, 24 VDC or 110 / 230 VAC respectively. It has an integrated GPS system that provides positioning information with SBAS differential corrections. Alternatively an external positioning system can be connected via a serial port.

Software

The system is delivered with a dedicated software package to be run on a customer laptop computer connected via Ethernet to the deck unit. It allows the user to plan and conduct the survey and acquire sonar data with embedded positioning information. The data can be processed, visualised and interpreted in the software package and exported in industry standard formats to third party packages for further use.

Easy deployment

The side scan system is designed for easy deployment and intuitive operation. It can be operated by non-specialised personnel to quickly carry out effective surveys using vessels of opportunity in search and recovery (SAR) missions. Underwater inspection and engineering surveys can easily be conducted without large overheads for survey platforms and survey specialists.

Basis for scientific investigation

The high resolution achievable with the system results in seafloor maps with detail that may form the basis for scientific investigation in areas such as marine geology and geophysics as well as marine archaeology

For more information about the PulSAR Side-Scan Sonar click here.

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