Raymarine RA1072HD, Installation Manual

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a much greater range. For this reason the angular width and rela-
tive bearing of any shadow sector must be determined at installa-
tion. Sometimes shadowing can be seen by increasing the radar
gain until noise is present. Dark sectors indicate possible shad-
owed areas. This information should be posted near the display
unit and operators must be alert for targets in these blind sectors.
It should also be noted that wet sails create shadow areas and
thus sail boat operators should be aware that radar performance
may reduce in rain.
If you mount the digital radar on a mast, echoes from the mast
may appear on the radar display. These can be minimized by
placing absorbing material, such as a block of wood, between the
digital radar and mast.
• Platform rigidity/stability: The radar platform should not twist
(causing bearing errors) or be subject to excessive vibration.
• Heat/fumes: Mount the digital radar away from the top of
exhaust stacks, since the array and cables can be damaged by
excessive heat and the corrosive effects of exhaust gases.
• Mounting Platform : The platform must be mechanically secure
and capable of supporting the mass and inertia of the open array
scanner. The complete digital radar unit (Open array and
Pedestal) weighs: 48" scanner - 25 kg (55.1 lb); 72" scanner - 29
kg (63.9 lb).
• The site must be clear of ropes and moving rigging.
• Sufficient clearance must be allowed to fully open the open array
pedestal for maintenance/service (
see Digital radar dimensions
on page ).