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1. MOUNTING
NOTICE
Do not apply paint, anti-corrosive sealant or contact
spray to coating or plastic parts of the equipment.
Those items contain organic solvents that can damage coating and
plastic parts, especially plastic connectors.
1.1 Antenna Unit
Mounting considerations
• The antenna unit is generally installed either on top of the wheelhouse or on the radar
mast, on a suitable platform Locate the antenna unit in an elevated position to permit
maximum target visibility.
• A line of sight from the antenna unit to the bow of the ship should hit the surface of the
sea in not more than 500 m or twice the ship’s length, depending which value is smaller,
for all load and trim conditions.
less than 500 m or twice the ship’s length
• Mount the antenna unit so that any blind sectors caused by objects (mast, etc.) are kept
to a minimum. No blind sector should exist in arc of the horizon from right ahead to 22.5°
aft of the beam to either side (see Figure 1 below). Also, individual blind sectors of more
than 5°, or the total arc of both blind sectors of more than 20°, should not occur in the
remaining arc (Figure 2). Note that any two blind sectors separated by 3° or less are
regarded as one sector.
Figure 1
Figure 2
a, b, c: less than 5 respectively
a+b+c+... : less than 20
22.5
22.5
less than 3
270
90
• Install the antenna unit safely away from interfering high-power energy sources and other
transmitting radio antenna.