Deep Towed Sonar System
MAK-1M

The MAK-1M system is a deep towed, dual-frequency side scan sonar (SSS) with simultaneous sub-bottom profiler (SBP). The system consists of 2 main subsystems: the surface equipment
(on the support vessel) and the subsea subsystem. Mechanical and electrical link between these subsystems is via a single coaxial electromechanical cable up to 10,000 m length.

Subsurface Subsystem

The surface equipment consists of desk-top and rack-mounted units. The data processor and line coupler are fitted in standard 19" rack mounts. The desktop units include PC AT 486 computer and a greyscale thermographic recorder. Features include:

  • computer data logging and control
  • real time true altitude detection
  • record annotation
  • input from subsea acoustic & GPS
    navigation
  • real time slant range correction
  • computer generated TVG curve for optimum display
  • record/playback capability

The post processing includes:

  • Water column removing
  • Correction of raw navigation data
  • Mosaicing of the SSS images in geographical coordinates
  • Reduction of the acoustic profiler image to true relief
  • Formation of the seabed section image in a given scale
  • SSS slant range correction
  • Transformation of scale and reduction of the seabed image to geographical coordinates

Subsea Subsystem

The subsea system consists of a neutrally buoyant towfish and passive depressor. The tow fish includes the following characteristics:

SONAR

Description High-Resolution Side-Scan Sonar Middle Range Side Scan Sonar Sub-bottom Profiler
Frequency, kHz 100 kHz 30 kHz 5.0 kHz
Pulse length, ms 0.25 ms 1.0 ms  0.3 ms
Horizontal beam width 1.5 deg. 2.0 deg.  
Vertical beam width 60 deg. 60 deg. 45 deg.
Maximum swath coverage 600 m 3000 m 150 m
TVG 40 dB 40 dB 20 dB

SENSORS

Description Echosounder
 "Up"		 Echosounder
 "Down"		 Responder Pitch Roll Heading Pressure Sensor
Output freq. 150 kHz  8-14 kHz 8-14 kHz       25-45 kHz
Pulse length  0.2 ms  10 ms 10 ms        
Maximum range    250 m 6000 m 8000 m ±30º +30º  0-360º  6000 m
Resolution    0.12 m 1.0 m 1.0 m  0.1º 0.1º 0.5º 0.1 m

 

Specifications
Tow fish neutral buoyant, passively stabilized, 450 kg in air
Depressor 600 kg in air
Cable 10,000 m length, standard single coaxial, double armored
Tow depth down to 6000 m
Tow speed up to 5 knots (1.5-2.5 kn. typically)
Sea state up to 6

 

To download PDF (Adobe Acrobat Reader) files of the two-page product sheet, click here: Page 1   Page 2

 
 

 

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CGGE International
A Sound Ocean Systems Inc. Company
P.O. Box 2978, Redmond, WA 98073-2978, U.S.A.
Tel: 425-558-1098, Fax: 425-556-0898
cgge@cggeinternational.com

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