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Falmouth Scientific, Inc. CHIRPceiver Sub Bottom Profiler for Towed and Hull Mount Systems

Towed, Hull Mount & Over the Side Chirp Sub Bottom Profiler

The HMS-622 CHIRPceiver and its associated transducers and arrays can fill a wide range of sub-bottom survey needs. Hull Mount, pole-mount, Over-the-side and towed applications available in both dual and single frequency configurations and supports three frequency bands. The Falmouth Scientific HMS-622 is a high power, portable, subbottom profiling system utilizing linear swept FM or 'Chirp' technology that provides deep bottom penetration through a variety of sediments.

  • Falmouth Scientific, Inc. CHIRPceiver Sub Bottom Profiler for Towed and Hull Mount Systems
Falmouth Scientific, Inc.
33 Jonathan Bourne Dr / PO Box 326
02559 Pocasset
United States
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The Falmouth Scientific HMS-622 Sub bottom Profiling System is a high power, portable, subbottom profiling system for towed, hull mount and over the side configurations utilizing linear swept FM or Chirp technology that provides deep bottom penetration through a variety of sediments. Sub-bottom profiling applications in diverse sediments require multiple frequency bands to support diverse survey requirements. The HMS-622 CHIRPceiverTM and transducer arrays and vehicles fill this wide range of survey needs. The frequency band supported by the HMS-622 include standard LF (1KHz-10KHz), and optional ULF (200Hz-2KHz) and HF (8KHz-23KHz). It can be easily configured for up to 50Khz with a standard 2 channel transceiver. CW frequencies can also be programmed within the respective band. The transducer and hydrophone arrays are configured to perform both the transmit and the receive functions of the system.

The HMS-622 CHIRPceiver uses a flexible Graphical User Interface connected via Ethernet that allows the user to set CHIRP or CW modes of operation, Start and Stop frequencies, and Pulse Lengths and Power Level for the output pulses. The receiver controls allow for Gain and Attenuation as well as Diagnostic modes. The user selectable direct 24 bit A/D input allows the user to input data for the HMS-620 Bubble Gun or other analog seismic system. The HMS-622 CHIRPceiver will also support multi-ping modes for higher along track resolution when operating in water depths deeper than a given ping rate. All sonar data is logged in SEGY format using industry standard acquisition software.

The CHIRPceiver is also available in a low cost single channel version for coastal surveys less than 500m water depth.

CHIRPciver Options

HMS-621 Single Channel CHIRPLitt SBP

HMS-622 Dual Channel CHIRPceiver SBP

HMS-622 Hull Mounted Systems 3000M-12000m Water Depth Range

HMS-BPA-62X CHIRPceiver Pipeliner Arrays

HMS-622 650Hz ULT CHIRPceiver Sub-Bottom Profiler


  • Product type
    Sub bottom profiling systems, CHIRP, SBP, Sub Bottom Profiler, Sub-bottom, sub bottom, Hull Mount
  • Application
    High Resolution
  • Power type
  • Portability of logger
  • Components to be used in combination with product
    FSI Subbottom Transducers or Existing Transducer Arrays, HMS-622, Hull Mount, Pole Mount, Small Vessel, Transducers
  • Max power consumption [W]
  • Transducer weight [kg]
  • Operating temperature: max. [°C]
  • Operating temperature: min. [°C]
  • Size (Deck unit)
    55.88 cm x 53.34 cm x 25.4 cm (22 in x 21 in x 10 in)
  • Weight (Deck Unit)
    Single 17.24 kg (38 lbs)/ Dual 19.95 kg (44 lbs)
  • Platform type
    Hull Mounted, Side Mounted, Pole Mounted, Surface Towed, Deep Towed, Towed
  • Signal composition
    Chirp, Broadband, Dual Frequency, Single Frequency
  • Operating System
  • Min. depth of operation [m]
  • Max. depth of operation [m]
  • Min. frequency [Hz]
  • Max. frequency [Hz]
  • Power output [W]
  • Max. resolution [m]
  • Max. penetration [m]
  • Max. pulse rate [Hz]
  • Max. pulse length [s]
  • Dynamic range [dB]
  • Programmable source signatures
    On the fly selectable frequency bands
  • Source Level
    212 dB re [email protected] 1m nominal
  • Frequency
    Wide band
  • Transmit Transducers
    Bands 200Hz-2KHz, 1KHz-10KHz, 8KHz-23KHz
  • Data Rate
  • Pulse Repetition Rate
    16Hz (63ms)
  • Cable length
    2000m Multi-conductor
  • Connections
  • Internal logging
  • Data output
  • Formats
  • Data displayed
    Most third party software (Chesapeake, Hypack, OIC, etc)
  • Main use
    Subbottom Profiling
  • Post-processing
    Most Third Party Software (Chesapeake, Hypack, OIC, etc)
  • Real time coupling to survey software
  • Remote operation
  • Operating System
    Windows 7 or higher
  • Model
    HMS-ATTR-4.5K Standard, HMS-ATTR-15K, HMS-650
  • Height [m]
  • Length [m]
  • Width [m]
  • Weight in Air
    12.7Kg (28lbs)
  • Tow speed
    1-8 Knots
  • Weight in air [kg]
  • Dimensions
    91.44cm x 45.72cm x 45.72cm (36in x 18in x 18in)
  • Dimensions
    40.64cm x 40.64cm x 45.72cm (16in x 16in x 18in)
  • Mounting Staff
    Flange Mount
  • Weight
    56.24Kg (124lbs) 2x2 Array HMS-ATTR-4.5K

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