Mounting; Antenna Unit; Mounting Consideration - Furuno FCR-2139S-BB Installation Manual

1.

MOUNTING

1.1

Antenna Unit

Mounting consideration

• The antenna unit is generally installed either on top of the wheelhouse, on the radar
mast, or 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.
• Mount the antenna unit so that any blind sectors caused by objects (mast, etc.) are
kept to minimum. No blind sector should exist in arc of the horizon from ahead to
22.5° aft of the beam to either side (see Figure 1 below). Also, individual blind sec-
tors 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.
270°
22.5°
Figure 1
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.
less than 500 m or twice the ship's length
90°
22.5°
a, b, c: less than 5° respectively
a+b+c+... : less than 20°
less than 3°
Figure 2
1-1