Furuno FELCOM 30 Installation Manual page 12

Mounting pole and mounting base
In order to ensure long life for the antenna electronics and mechanics, the antenna must be
installed properly on a specially designed pole with suitable flange and rubber gasket.
Below are guidelines for installation of the mounting pole and mounting base.
• The pole serves the purpose of protecting the coax cable and its N-type male connector
where it joins the N-type female connector at the bottom of the dome. Further, it is a very
important part of the ventilation system of the dome; the hole in the pipe allows trapped
moisture to escape from the dome.
• The face of the mounting base should be flat as possible (tolerance: within 2 millimeters
of the horizontal plane).
• The mounting base should be parallel with ship's horizontal plane (tolerance: ±1°).
• The fixing bolts of the mounting base should be parallel with the ship's keel line
(tolerance: ±2°).
• Weld a ground bolt (stainless steel, M10x40, local supply) to the mast within 50 cm of a
fixing bolt on the antenna unit. The length of the ground wire (local supply) is 50 cm.
HOLE
DIA 9 mm
100 mm
140 mm
Mounting pole and mounting base
5
100 mm 140 mm