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6.1 Warnings and cautions
Important:
Before proceeding, ensure that you have read and understood the
warnings and cautions provided in the following section of this document:
p.9 — Important information
6.2 Location requirements
The optimum height for the Quantum ™ scanner is a location that is high
enough above the waterline to give a long range line-of-sight to the horizon,
but not so high as to be adversely affected by the vessel's pitching and rolling.
The scanner must also be mounted where it is:
• Above head height.
• Easily accessible.
• As near as possible to the vessel's centerline.
Location requirements
• On a rigid and stable platform, capable of securely supporting the scanner
under seagoing conditions.
• Clear of large objects such as the flybridge, large engine stacks,
searchlights, horns, masts, etc. For additional information, see:
p.29 — Shadow areas and false echoes
• Clear of heat and fumes.
• At least 1 m (3 ft) from a magnetic compass or other scanners.
Shadow areas and false echoes
Mount the Radar scanner away from large structures or equipment, such
as engine stacks, searchlights, horns, or masts. These objects may cause
shadow areas and false echoes. For example, if you mount the Radar scanner
on a mast, echoes from other targets may be reflected from the mast. Wet
sails may also cause shadow areas, so Radar performance may be reduced
in the rain. It is particularly important to avoid shadow areas near the bow.
Raising or even lowering the Radar scanner may help to reduce these effects.
In shadow areas beyond the obstruction there will be a reduction of the beam
intensity. There may be a blind sector if the beam intensity is not sufficient
to obtain an echo from an object. This may occur even at close range. For
this reason the angular width and relative bearing of any shadow area must
be determined at installation.
You may be able to detect shadow areas or false echoes on your
multifunction display. For example, sea clutter can be used as a good
indicator of blind arcs. Dark sectors on the Radar display indicate possible
shadowed areas. This information should be posted near the display unit and
operators must be alert for targets in these blind areas.
Radar scanner mounting angle
Ensure the Radar scanner rotates parallel to the water line.
The Radar beam from the Radar scanner is approximately 20° wide in the
vertical direction, to give good target detection even when your vessel
pitches and rolls.
29
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Troubleshooting
