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Before you begin, consider the following antenna
installation guidelines.
Choose a Suitable Location
• Select a location that is as close as possible to
the intersection of the vessel’s centerline and
midships.
• Both service hatches should be fully
accessible for installation and service.
• Temperature must be within the operating
range (-30ºC to 55ºC (-22ºF to 131ºF)).
• Avoid placing the antenna near any magnetic
compasses or other onboard antennas to
prevent potential interference.
Meet Mounting Structure Requirements
If available, install the antenna on a platform or
pedestal, rather than on a deck, and ensure the
diameter of the mounting surface matches the
antenna’s base (19.01" (48.29 cm)) (see Figure 2).
Make sure the mounting surface is flat and level
(within ±1º). Also make sure the mounting
structure is strong enough to withstand the
weight of the antenna (240 lbs (109 kg), excluding
cables) as well as other cumulative forces related
to expected operating conditions, such as ice,
snow, wash down, and maximum expected
values of pitch, roll, and wind pressure
(including gusts).
Vibration of the mounting surface should
measure less than 0.51 gRMS total, and also less
than 0.11 gRMS at the following resonant
frequencies and axes:
• 14.93 Hz and 60.89 Hz in Horizontal Forward
X-Direction
• 16.07 Hz and 71.02 Hz in Horizontal Side
Y-Direction
• 37.7 Hz and 79.89 Hz in Vertical Z-Direction
Please consult with your shipyard to assure that
the antenna mounting surface vibration never
exceeds the above stated conditions at any time
during its life.
57.28"
(145.50 cm)
19.01"
(48.29 cm)
Ø51.30"
(130.31 cm)
9.74"
(24.74 cm)
9.74"
(24.74 cm)
Mounting Hole
4x Ø0.63" (1.59 cm)
Ø13.78"
(35.00 cm)
Cable Connectors
(cable cover not shown)
Service
Hatch
Side View
Bottom View
Service
Hatch
FWD
Figure 2: Antenna Dimensions
Plan the Antenna Installation
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