GUIDANCE MARINE RadaScan View, Руководство по установке

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Positioning Responders
The location, range and orientation of the Responders in relation to the Sensor have a significant
effect on the tracking performance of the RadaScan system, and hence on the quality of the
position data sent to the DP system.
The RadaScan system is based on radar technology. Metallic structures reflect the microwave
beam transmitted by the sensor, and can cause multipath interference, where ghost images are
reported by the system. However, this unwanted phenomenon can be prevented by carefully
positioning the responders according to the following guidelines:
Responders Should be Mounted:
9 9
With a clear, unobstructed view towards the RadaScan-equipped vessel.
9 9
At a height
no lower than two metres below
the vessel-mounted Sensor.
9 9
At a height no higher than five metres above the vessel-mounted Sensor.
9 9
On outside corners of the rig or platform to minimise the amount of
metallic structure around them.
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Good Location
9
Good angle of incidence.
9 Lower angle of elevation allows
vessel to pick up responder on
approach.
9 Longer range aids performance
in high sea states.
9 Usually clear of obstructions
and away from enclosed corners.
9 Provides adequate cover
during vessel manœuvres.
R
Rig/Platform
RadaScan Vessel
Good
Responder
Locations
9
Poor Location
9
Good angle of incidence.
 Steep angle of elevation prevents
vessel from picking up responder
on approach.
 Shorter range inhibits performance
in high sea states.
 Often surrounded by obstructions
and radar-reflecting metalwork.
 Does not provide adequate cover
during all vessel manœuvres.
R
Rig/Platform
RadaScan Vessel
Poor
Responder
Location

Responders Should NOT be Mounted:
9 
On inside corners.
9 
Below an overhang.
9 
On lower service decks below a main-deck overhang.
9 
Suspended from a lanyard or length of rope.