Furuno FELCOM 250 - Manual (Page 11)

1. HOW TO INSTALL THE UNIT
5
Antenna mast and mounting base
To get the best performance from the antenna electronics and mechanics, the antenna must be
installed properly on a specially designed mast with suitable flange and rubber gasket. Below are
guidelines for installation of the mounting mast and mounting base.
• The mounting base should be parallel to the ship's waterline (tolerance: ±3°).
• Weld a ground bolt of stainless steel to the mast (figure below). Connect the ground wire from
the antenna unit to the ground bolt.
6× φ 8
Fixing Hole
φ 60 ( φ2.36")
Cable Entry and Drain
110mm
(4.33"
)
200 mm (7.87")
FELCOM 500 FELCOM 250
200 mm (7.87"
)
254 mm (10")
360 mm (14.17")
254 mm (10"
)
360 mm (14.17"
)
HOLE
DIA 12 mm (0.47")
[Mounting base]
[Antenna mast: Example]
Thickness:
Minimum 20 mm (0.79")
Weld a ground bolt
M10x40 (same
direction of the
cable gland of
the antenna unit)
Approx. 100 mm (4"
)
Approx. 100 mm (4"
)
Weld an elbow pipe
for the cable entrance.
The inner diameter
should be larger than
the outer diameter of
the cable.
Don't seal with putty.
[Antenna pole: Example]
Make a drain hole at the
base of the pole.
Thickness:
Minimum 10 mm (0.39")
[Mounting base]
Weld a ground bolt M6x40
φ76.3
(
φ3.00")
φ139.8
(
φ5.50")