Edgetech X Star 3100-P Sub-Bottom Profiling System

Available as:
  • Rental
  • Sale (ex rental)

Edgetech X Star 3100-P Sub-Bottom Profiling System – Available for rental, hire and ex-rental purchase from Ashtead Technology.

The 3100-P is EdgeTech’s portable sub-bottom profiling system. It uses Full Spectrum (“chirp”) pulses to create high definition image slices of sub-bottom structure below the bottom. It can be used in rivers, lakes, ponds, and in the ocean. The towfish use special designed transmitters with low Q- wide band characteristics best suited for “chirp” transmissions. Two (2) multi element line array hydro-phones are installed in the tow vehicle to reduce acoustic scattering from the sides. This results in a narrower across/along track beam pattern. A linear power amplifier is used to generate clean, harmonic free transmissions. A portable splash resistant topside case contains the amplifier and other Full Spectrum electronics. A laptop computer running EdgeTech’s DISCOVER sub-bottom software is where the sonar data is displayed and stored. A number of industry standard thermal gray shade printers are supported.

Key features

  • 20-30 dB improved SNR over conventional systems using Full Spectrum (″chirp″) Pulses
  • Low power requirement
  • Portable


  • Geotechnical surveys
  • Hazard surveys
  • Environmental site investigations
  • Geological studies
  • Buried object location
  • Search and Recovery
  • Locate and map buried pipelines and cables
  • Mining and dredging surveys
  • Bridge and shoreline scour surveys

Technical specifications

Towfish Model SB-424Frequency Range: 4 - 24 kHz
Pulses (User selected): 4-24 kHz, 4-20 kHz, 4-16 kHz
Vertical Resolution: 4 cm / 4-24 kHz;6 cm / 4-20 kHz; 8 cm / 4-16 kHz
Penetration (typical) in coarse calcareous sand (meters): 2 ; in clay (meters): 40
Beam Width (depends on center frequency)16° / 4-24 kHz 19° / 4-20 kHz 23° / 4-16 kHz
16° / 4-24 kHz 19° / 4-20 kHz 23° / 4-16 kHz3 shielded twisted pairs (5 used)
Maximum Towfish Operating Depth300 meters (1,000 feet)
Optimum Tow Height3 to 5 meters above sea floor
Tow Speed3-4 knots optimal, 7 knots maximum safe operational


77 L x 50 W x 34 H cm45 kg