TM 11-5840-360-14-1-1
2.1.2 Equipment Inspection
it.
Complete and detailed packing lists are shipped
When planning the antenna installation,
with the equipment. After all shipping containers have
particular attention should be given to the waveguide
been unpacked, their contents should be inspected for
and cable run, especially the waveguide. It is important
damage and should be checked against the packing lists
to ensure that:
to ascertain that all items are accounted fdr.
1. Cable runs are not seriously obstructed by the
NOTE
type of mounting employed.
It is strongly recommended that a
2. Cable runs are properly supported and do not
Raytheon representative be called in
provide impromptu foot-holds or hand-holds.
when the equipment is unpacked,
3. All waveguide joints are choke-to-cover with the
especially in case of apparent
choke at the bottom and have waterproofing O-ring
transport damage or if an item is
seals.
thought to be missing. This
4. The electrical installation conditions outlined in
representative is qualified to assist in
ascertaining the amount of damage
and the replacement parts needed.
2.2.2 Equipment Location Considerations The exact
position, attitude, and location of the units cannot be
2.1.3 Repacking and Storage
predetermined because each system is in effect custom-
After all of the radar components have been unpacked
installed. In addition to the factors set forth in paragraph
and inspected, they should be repacked in their shipping
cartons or crates and stored in a dry place until ready for
1. The length of cable run between the receiver
installation. The units should not be removed from the
transmitter and the antenna should be as short as
cartons or crates again until the actual installation
possible consistent with shipboard practices.
procedure is underway.
2. The length of cable run between the receiver
NOTE
transmitter and the indicator should not exceed 220 feet.
During installation, the radar
3. The length of the waveguide run from the
components should be temporarily
antenna pedestal rotating joint to the receiver
covered with a water/dust-proof
transmitter cover flange must not exceed 50 feet (WR90
cover to protect them from water
waveguide) or 100 feet (WR112 waveguide).
spray, paint spray, dust, etc.
NOTE
Contact Raytheon for recommendations
2.2 SYSTEMS INSTALLATION PLANNING
concerning installations requiring
longer cable and/or waveguide runs
2.2.1 General Installation Practices
than specified above.
Maximum flexibility is provided for the
installation of the radar. Several factors contribute to a
2.2.2.1 Antennas and Pedestals - Generally, the best
successful plan:
results are obtained by installing the antenna and
1. The type, service, and size of the vessel.
pedestal on a mast near the bridge structure. The
2. The availability of mounting space, and its
principal planning features to be considered are:
location.
1. The location must not be near the top of the
3. Space required for operation and servicing of
stack or at some lower adjacent point. The stack is a
the units.
large obstruction to the radiated beam that would
4. The availability of ship's power.
adversely affect the beam pattern, and may also subject
5. Freedom from electrical and mechanical
the antenna to excessive heat and operation in a
corrosive environment.
In general, the antenna should be installed on a
2. The radiated antenna beam must not be
mast as high as practical, or mounted in line with the
obstructed by large masses close to its source. The
ship's centerline atop the wheelhouse or bridge. The
view in the forward direction must be unobstructed.
indicator is mounted in the wheelhouse at a convenient
viewing location. The receiver transmitter installation
should be close to the antenna, preferably directly below
2-2
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