1. MOUNTING
NOTICE
Do not apply paint,
Those items contain organic solvents that can damage coating and plastic parts, especially plastic connectors.
1.1 Antenna Unit
Mounting considerations
The antenna unit is generally installed either on top of the wheelhouse, on the radar mast, or on a suitable platform. The mounting location should afford a good
Siting
•No funnel, mast or derrick should be within the vertical beamwidth of the antenna unit in the bow direction, especially zero degrees ±5°, to prevent blind sectors and false echoes on the radar picture.
•Deposits and fumes from a funnel or other exhaust vent can adversely affect the aerial perfor- mance and hot gases may deform the radiator. The antenna unit must not be mounted where the temperature is more than 70°C.
•Locate a direction finder antenna clear of the antenna unit to prevent interference to the direc- tion finder. A separation of more than two meters is recommended.
•Choose a location where reflections from the radar reflector will not be received by the radar antenna.
•The "standard" antenna unit orientation has the cable glands directed toward the bow.
•Leave sufficient space around the unit for maintenance and servicing. See the antenna unit out- line drawing for recommended maintenance space.
Mounting
•Use rope and crane to hoist the antenna unit to the mounting location. Lifting fixtures are pro- vided on the antenna chassis to which to fasten rope.
•Mount the unit parallel to the waterline.
•A hole is required in the mounting platform for the antenna cable.
•An appropriate platform should be constructed at the mounting location to facilitate installation and maintenance work.
•Connect ground wire between antenna terminal on antenna chassis and ground point.
•If the mounting platform is made of steel paint it to prevent electrolytic corrosion. DO NOT paint the antenna radiator.