DEVIATIONS FROM CRITERIA FOR AIR FORCE AIRFIELD SUPPORT FACILITIES
A14.1. Waiverable Airfield Support Facilities:
A14.1.1. Contents. This section provides information for selected airfield support systems and
facilities that are authorized to deviate from criteria presented in this manual with a specific waiver
from the MAJCOM. The standard designs for these facilities and systems are not considered frangible
and therefore, must not be sited within the frangibility zones described within paragraph A14.2.2 and
A14.1.2. Army, Navy and Marine Corps Requirements. This attachment does not apply to the Army,
Navy, and Marine Corps.
A14.1.3. Fixed Base Airport Surveillance Radar (ASR) or Fixed Base Digital Airport Surveillance
Radar (DASR). Radar that displays range and azimuth typically is used in a terminal area as an aid to
approach and departure control. Normally, ASR and DASR is used to identify and control air traffic
within 60 nautical miles of the airfield. The antenna scans through 360 degrees to give the air traffic
controller information on the location of all aircraft within line-of-sight range. The antenna, located
adjacent to the transmitter or receiver shelter, is elevated to obtain the required line-of-sight distance.
A14.1.4. Airport Rotating Beacon. Airport rotating beacons are devices that project beams of light,
indicating the location of an air base. Detailed siting guidance is found in AFMAN 32-1076, Visual
Air Navigation Facilities.
A14.1.5. Nondirectional Radio Beacon Facilities. Radio beacon facilities are nondirectional aids used
to provide homing, fixing, and air navigation assistance to aircraft with suitable automated direction
finding equipment. They consist of two categories: a medium power, low frequency beacon and a
A14.1.6. Rotating Beam Ceilometers. The rotating beam ceilometer measures cloud height. It
includes a projector, detector, and indicator. The projector and detector are sited in the runway
approach 900 meters [3,000 feet] to 1,200 meters [4,000 feet] from the touchdown point. The detector
is located closest to the runway threshold; the projector is located 120 meters [400 feet] from the
detector. The indicator is installed in the weather observation building.
A14.1.7. Laser Beam Ceilometers. The Laser beam ceilometer measures cloud height. The
ceilometer is sited in the runway approach 900 meters (3,000 feet) to 1200 meters (4,000) feet from the
touchdown point. The indicator(s) is/are installed in the weather facilities and/or air traffic control
A14.1.8. Air Traffic Control Tower (ATCT). The Air Traffic Control Tower cab must be correctly
oriented so that the area to be controlled is visible from the cab. Air traffic controllers must have
equipment in the cab or with navigational equipment on the ground. A site survey must be conducted
to determine the best siting. For planning and design considerations, the site survey should be
conducted within five years of the projected ATCT construction completion date. For these and other
operational and technical aspects and considerations of selecting a site, consult Air Force Flight
Standards Agency, Engineering and Systems Integration Branch (HQ AFFSA/XRE), 1535 Command
Drive, Suite D309, Andrews AFB, MD 20762-7002, in the early stages of planning. Specific
architectural, structural, mechanical, and electrical systems design requirements may be found in the
Air Traffic Control Tower Design Guide published by the Design Group Division at Headquarters, Air
Force Center for Environmental Excellence (HQ AFCEE/DCD), 8004 Arnold Drive, Brooks AFB TX
78235-5361. Also see paragraph A18.104.22.168.7, and Attachment 18.