UFC 3-535-01
17 November 2005
10-1.3.4
Located 225 meters (750 feet) or more from the control tower. This is
intended to prevent light reflection during foggy conditions which reduce visibility and
interfere with light gun signals from the control tower cab.
10-1.3.5
Not more than 1,800 meters (6,000 feet) from the nearest point of usable
landing area, except if surrounding terrain will restrict visibility of the beacon through an
appreciable angle in some directions or the beacon will serve more than one airfield. If
terrain restricts viewing the beacon or the beacon will serve more than one airfield, the
distance of the beacon from the nearest runway may be increased to not more than two
miles.
10-1.3.6
The base of the beacon must be not less than 6 meters (20 feet) higher
than the elevation of the floor of the control tower cab. If the airfield rotating beacon is
located more than 1,800 meters (6,000 feet) from the nearest point of usable landing
area, an identification beacon must be installed and not more than 1,800 meters (6,000
feet) from the nearest point of usable landing area.
10-1.4
Photometric Requirements
The photometric requirements for the airfield rotating beacon and the identification
beacon must be:
10-1.4.1
Colors
The color of the emitted light must be standard aviation colors in accordance with the
latest FAA criteria.
10-1.4.2
Airfield Rotating Beacon
With the lenses and the color filters removed and the beacon stationary and operating
at rated voltage, the intensity in white light of each beam must be not less than
1,200,000 candelas for a distribution not less than one degree horizontally and 4.5
degrees vertically.
10-1.4.3
Identification Beacon
With the beacon operating steadily (not flashing) at rated voltage, the intensity of the
green light must be not less than 1,500 candelas for a distribution through 360 degrees
horizontally and 2 degrees vertically. The areas of the beam where the support rods are
located may be less than these required intensities.
10-1.5
Aiming
The vertical aiming of the beacons should be properly focused and aimed when
manufactured, and leveling should be all that is required for aiming during installation.
The axes of the beams vertically should be approximately five degrees above the
horizontal for the rotating beacon. For the identification beacon, the center of the beam
must be approximately 3 degrees above horizontal.
10-1.6
Equipment
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