Offshore Rib

A 7m rib based at Barry Docks, West Glamorgan, available for buoy and beacon surveys and maintenance

This 7m offshore RIB can be deployed any where in the country at short notice.

It is utilised to carry out hydrographic surveys and light casualty work such as replacing lanterns, batteries and electronic equipment on navigation buoys.

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Offshore RIB and trailer

TECHNICAL SPECIFICATION


  • 7 metres LOA
  • 3-metre beam
  • Twin 90hp o/b motors
  • Max speed 38 knots
  • MCA Workboat code for 6 persons
    20miles.
  • DGPS chart plotter
  • Echo sounder
  • Computer with Hypack survey package
  • Sidescan sonar
  • Structure scan sonar
  • VHF radios
  • Road/launching trailer

SURVEY EQUIPMENT DETAILS

DEPTH MEASUREMENT

  • Ceestar Survey Echo Sounder
    200 kHz 8 degree beam width @ 3dB

  • Lowrance 50/200kHz echo sounder
    Beamwidth 50 kHz 45° @-3dB 200 kHz 12° @-3dB

  • Fox-121 waterproof panel PC

  • Simrad DGPS chart plotter

  • Valeport Digital Sound Velocity Profiler
    Range 1400 to 1600 m/s Resolution 0.001 m/s
    Accuracy +/- 0.05 m/s Acoustic frequency 2.5 Mhz, single pulse

    Transducer drafts calculated by bar check

  • Ceestar 200kHz – 0.55m

  • Lowrance 50kHz – 0.55m

POSITION FIXING

  • Simrad MX575B D/GPS Compass
    Heading accuracy of 0.5°
  • Position updates up to 5 Hz Heading updates up to 10 Hz
  • Integrated DGPS sources including WAAS, EGNOS, and Beacon
  • Sub-meter DGPS accuracy
  • No offset required; DGPS antenna is positioned directly above transducers.

SURVEY SOFTWARE

  • Hypack

SIDESCAN EQUIPMENT

  • Imagenex Sportscan
    Dual Frequency – 330/800kHz
    Transducer – 1 per side tilted down at 20°
    Beamwidth 330 kHz 1.8°x 60° 800 kHz 0.7° x 30°
  • Lowrance Structure Scan
    Dual Frequency 455kHz and 800kHz
    Sonar Output Power Max WRMS: 500W, WPK: 4000W W
  • Sidescan Specifications
    Max Range: 455kHz (500ft — 250/side) 800kHz (300ft —150/side)
  • Downscan Specifications
    Max Depth: 100 ft (800kHz); 300 ft (455kHz)