Laser Targets

When operating on Dynamic Positioning (DP) with local position reference sensors (LPRS), a vessel requires high quality, line of sight targets mounted on the Offshore Installation. All microwave and laser sensors require reflectors to be installed on the approach installation. The higher the quality of the reflectors the safer your vessel. Moving installations (FPSOs etc.) should have two reflectors in order to derive installation heading. Microwave reflectors provide all weather capability. Laser reflectors depend on having sufficient visibility.

Prisms - up to 2500m range

These reflect almost all the light received and provide the maximum signal strength allowing for longer operation in deteriorating visibility. They are typically mounted in clusters to provide a greater angle of visibility and/or to increase the signal response in locations prone to low visibility.

Absolute Signature (AS) Prism


The AS Prism can be purchased directly through Guidance Marine Direct  Visit Marine Direct Website

Tape Targets - up to 500m range

These rely on having enough randomly scattered reflective material within the tape that some will retro-reflect. These are lower cost solutions but the signal attenuation at the reflector limits the maximum operating range and will cause a much earlier loss of signal in deteriorating visibility. They are recommended for augmenting prism clusters at installations with complicated layouts and cluttered vessel approaches.

 CyScan targets can be purchased directly through Guidance Marine Direct  Visit Marine Direct Website

Absolute Signature Technology Benefits

  • Guaranteed 'signature lock' between the sensor and the target
  • Improves visibility with automatic target identification and acquisition
  • Reduces turnaround time - increases operational efficiency 
  • Eliminates the possibility of false reflection walk-off incidents
  • Simple and reliable operator experience

Guidance Marine has a patent pending on AS technology.

The only purpose built prism designed for the offshore marine environment

Prisms are glass retro-reflectors that reflect a much higher percentage of the incident light giving the DP sensor (of any manufacturer) a much greater range. The AS Prism has design features to provide prism protection, high target visibility and varied flexible mounting options to allow for wider and easier customer installations.

Prism Benefits

  • Reflect almost all of the light received
  • Provide maximum signal strength
  • Allows for longer operation in deteriorating visibility
  • Typically mounted in clusters to provide a greater angle of visibility and/or to increase the signal response in locations prone to low visibility
  • Use CyScan to 2500m for long range operations beyond the 500m DP zone

Robust Design Features

  • High visibility, easy to identify
  • Robust housing design suitable for handovers
  • Easy 'drop on' rail mounting
  • Suitable for long-term wall or handrail mounting

Robust Design Benefits

  • The only purpose built prism designed for the offshore marine environment
  • High visibility, easy to identify
  • Robust housing design suitable for handovers
  • Easy 'drop on' rail mounting
  • Suitable for long-term wall or handrail mounting

  • Entry level and lower cost than a prism
  • Rely on having enough randomly scattered reflective material within the 3M tape that some will retro-reflect 
  • Used for short range operations (≤500m)
  • Recommended for augmenting prism clusters at installations with complicated layouts and cluttered vessel approaches
  • RadaScan and RadaScan View compatible - 360º navigation off one responder
  • ATEX and CSA certified
  • All weather operation
  • Unique coded ID
  • Auto target detection
  • Single or multiple responder capability
  • Various power options

Power Options

Mounting Options

  • Guidance Marine provide a universal swivel bracket which is suitable for all responder power and installation options. 

Laser

For maximum safety and visibility, Guidance Marine always recommends glass prisms.

Maintenance and Inspection

Regular maintenance and inspection is essential. Consideration should be given to the following:
  • Targets have not been dislodged or reorientated 
  • Targets continue to have good line of sight and remain unobstructed
  • Laser targets are free from salt rimming and UV degradation
  • Responders have power available to them
  • MOU data cards are up to date

Reflective Material
 Target
Maximum Operating Range
Angle of Visibility
Tape
1.9m cylindrical
400m  360º
Prism
8 way prism
Up to 2500m
 195º
Data courtesy of Guidance Marine.

Patents granted or pending: GB 2478954, EP 2369363

Applicable to RadaScan and Responders (rechargeable, PCP, mains)

Patent pending: GB 1421232.8

Applicable to Rugged Prism





     
   


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