Mounting The Equipment - Furuno FELCOM 12 Installation Manual

3. MOUNTING THE EQUIPMENT

Mounting Location
Antenna unit
1) Mount the omnidirectional antenna high atop
a mast clear of stays and the turning diam-
eter of a radar scanner. The ideal mounting
location would be where no obstacle appears
in the fore and aft directions down to -5˚ and
down to -15˚ in the port and starboard direc-
tions. This concept is illustrated in
Figure 3-1. Shadow sector of the antenna
mast, whip antenna, etc. should be within 2
degrees at one meter from the antenna unit.
ANTENNA UNIT
5˚
Figure 3-1 Antenna unit mounting location
2) If both Inmarsat-A/B and Inmarsat-C ship
earth stations are installed, separate the
Inmarsat-A/B antenna at least 8 m from the
Inmarsat-C antenna.
3) Separate the antenna unit from an S-band
radar as follows:
INSTALLATION
ZONE
2 m
15˚
2 m
5 m
S band radar
Figure 3-2 S band radar and installation area
4) The allowable vibration level as specified by
Inmarsat is as shown in the table below.
Table 3-1 Allowable vibration level
F e r q u e n c y
2 o t 0 1 H z
0 1 o t 1 0 0 H z
5˚
15˚ 15˚
Install above this line
PROHIBITED
1.5 m ZONE
HORIZONTAL LINE
L e v l e
. 2 4 5 m m e P k a A m p i l u t e d
2
9 8 . m s / e P k a A c c l e r e i t a n o
5) Avoid the location near funnels and stacks;
smoke and soot on the radome can lower sig-
nal level.
6) Never mount the antenna unit on a metal
plate more than 20 cm square. Use the an-
tennal mounting pipe (supplied), or fix or
weld it to a bracket as shown below.
more than
20 cm
more than
20 cm
Welding
Figure 3-3 Mounting the antenna
Use bracket
and hose clamp
(local supply)
3