Furuno FELCOM 250 Installation Manual page 11

1. HOW TO INSTALL THE UNIT
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.
FELCOM 500
HOLE
DIA 12 mm (0.47")
254 mm (10")
360 mm (14.17")
[Mounting base]
Thickness:
Minimum 20 mm (0.79")
φ139.8
(φ5.50")
[Antenna mast: Example]
Weld a ground bolt
M10x40 (same
direction of the
cable gland of
the antenna unit)
φ76.3
(φ3.00")
5
FELCOM 250
200 mm (7.87")
φ
60
φ
6× 8
Cable Entry and Drain
Fixing Hole
[Mounting base]
Thickness:
Minimum 10 mm (0.39")
Weld a ground bolt M6x40
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.
Make a drain hole at the
base of the pole.
[Antenna pole: Example]
(φ2.36")