TM 11-5840-281-12-1
4.5.
SITE AND SHELTER REQUIREMENTS. (CONT)
9. Set up theodolite at center of radar site selected. Be sure theodolite is level.
10. Site theodolite on horizon and rotate through 360 degrees in azimuth. Measure angles of any obstructions
to line-of-sight view. Give special consideration to coverage of approach zones to runways.
NOTE
Dimensions of approach zones vary with size of airfield. If not known, obtain dimensions
from a higher authority.
11. Mark a stadia rod or pole at same height as that of theodolite telescope.
12. Direct second person to hold stadia rod or pole in a vertical position on td point. Site horizontal crosshair of
theodolite on mark made in step 11. If radar site is higher than td point, be sure negative ground angle does
not exceed - 1 degree. Repeat this for each runway being considered for gca service.
NOTE
If all requirements of steps 10 and 12 are satisfied, proceed with step 13; if not, select new
radar site and repeat procedure starting with step 6.
13. Mark exact center of radar site for equipment installation.
14. Select an operating site in accordance with the requirements for Accessibility (para 4-5) and Equipment
Component Location (para 4-5).
15. Mark locations for equipment to be installed at operating site.
SHELTER REQUIREMENTS
Radar set is functionally operational without any shelter or associated equipment. However, when radar set is to be
operated as part of a gca and air traffic control facility, a shelter is needed to house radio communication, IFF, and other
associated equipment. Refer to TM 11-5895-474-12 addendum when radar set is being installed as part of Landing
Control Central AN/TSQ-71B.
4-6.
UNPACKING.
Radar set is shipped encased in metal frames, steel drums, and wooden crates. It is received in one of two conditions,
depending on the method of transportation. When transported over short distances, such as by helicopter or truck, the
control-indicators groups and receiver-transmitter are received installed in their own weatherproof cases,which are
mounted in tubular shipping frames. Antennas and mechanical assemblies are received packed in two shipping frames.
When being shipped over long distances, such as by cargo airlift, railroad, or cargo vessel, these shipping frames, along
with the control-indicators groups and receiver-transmitter, are received packaged separately in wooden crates. Small
parts and hardware, such as waveguides, ground anchors, and mounting hardware, are packed in two drums. The
antenna pedestal is received strapped in a folded position and requires no shipping container. Interconnecting cables are
received on six reels.
4-11
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