Attachment 14
A14.2.13. Terminal Very High Frequency Omnirange (TVOR) Facility and Very High Frequency
Omnirange (VOR) Facility (Non-Frangible). TVOR and VOR facilities may be located not less than
152.4 meters [500 feet] from the centerline of any runway to the edge of the facility, nor less than 61
meters [200 feet] from the centerline of a taxiway.
A14.2.14. Tactical Air Navigation (TACAN) Facility and Very High Frequency Omnidirectional
Radio Range (VORTAC) Facility (Non-Frangible). When used as terminal navigational aids, the
TACAN and VORTAC facilities may be sited not less than 152.4 meters [500 feet] from the centerline
of any runway to the edge of the facilities, provided the elevation of the antenna does not exceed 15.2
meters [50 feet] above the highest point of the adjacent runway centerline. For an on-base installation,
the maximum angle of convergence between the runway centerline and TACAN end approach course
is 30 degrees (30) at a point 914.4 meters [3,000 feet] from the runway threshold.
A14.2.15. Runway Supervisory Unit (RSU) (Non-Frangible). An RSU is a transportable or permanent
all-weather, control tower type facility used to control or monitor aircraft movement. The RSU
complex, consisting of the facility and all support equipment, must be confined to a site not to exceed
15.2 meters [50 feet] long by 15.2 meters [50 feet] wide. A minimum distance of 76.2 meters [250
feet] must be maintained between the runway centerline and the RSU facility and support equipment.
Integral fuel tanks should be used for necessary mobile emergency power generator sets. If additional
fuel storage tanks are required, they should be placed below grade.
A14.2.16. Transmissometer Facilities (Non-Frangible). Transmissometer facilities measure and
record horizontal visibility. They are installed adjacent to the ILS runway. Measurements are in terms
of runway visual range (RVR), a reference of how far a pilot of an aircraft should be able to see high
intensity runway edge lights. A transmissometer installation consists of a projector, detector, and
recording or readout unit (RVR computer). Transmissometer equipment may be sited not less than
121.9 meters [400 feet] from the centerline of the supported runway to the centerline of the equipment
nor less than 61 meters [200 feet] from the centerline of any taxiway.
A14.2.17. Wind Measuring Set (Non-Frangible). The wind measuring set measures wind speed and
direction. It consists of a transmitter, indicator and recorder. The transmitter is mounted on a mast and
is sited where representative winds of the runway touchdown area can be measured. The recorder is
installed in the weather observation building. The transmitter may be sited not less than 152.4 meters
[500 feet] from the runway centerline to the centerline of the equipment.
A14.2.18. Temperature-Humidity Measuring Set (Non-Frangible). The temperature-humidity
measuring set measures temperature and a dew point of free air passing over a sensor. The set consists
of a transmitter and indicator. The transmitter sensing elements are mounted on a pipe mast about 2
meters [6 feet] above the ground installed in a representative location on the airfield. The indicator is
located in the weather observation building. The transmitter may be sited not less than 152.4 meters
[500 feet] from the runway centerline to the centerline of the equipment.
A14.2.19. Wind Direction Indicators (Frangible and Non-Frangible):
A14.2.19.1. Wind Cones. Wind cone mountings are of two types. Type L-806 is Mounted on a
low mass supporting structure (frangible); Type L-807 is mounted on a rigid supporting structure
(non-frangible). Either type must be located at least 121.9 meters [400 feet] from the centerline of
the runway to the centerline of the wind cone and in a location free from the effects of air
disturbances caused by nearby objects. A height of more than 8.23 meters [27 feet] above ground
elevation (not including the obstruction light) requires a waiver. Wind cone supports must comply
with guidance provided in AFMAN 32-1076.
A14-7
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