UFC 3-535-01
17 November 2005
stroke, and shape of legend characters, numerals, and symbols must be in accordance
with FAA AC 150/5345-44, Appendix 1.
9-6.3.2
Dimensions
See FAA 150/5345-18 Chapter 1 for marker and legend height dimensions. FAA Size 4
sign has a legend height of 1020 millimeters (40 inches), legend panel height of 1220
millimeters (48 inches), and overall mounting height of 1370-1520 millimeters (54-60
inches). The marker should provide at least 30 centimeters (12 inches) clearance
between the top of the sign and any part of the most critical aircraft expected to use the
runway when the aircraft wheels are at the pavement edge.
9-6.3.3
Electrical
See paragraph 9-2.3.3.
9-6.3.4
Photometrics
The average sign luminance, as determined in accordance with FAA AC 150/5345-44,
must be as follows for all intensity steps: white legend, 29 to 88 foot-lamberts.
9-6.3.5
Night VFR operations
If a training program for night VFR operations is to be conducted on an auxiliary airfield
runway, retro-reflective tape may be used on markers (rather than internally illuminated
numerals), provided the aircraft landing lights are adequate to illuminate the markers.
Use of retro-reflective tape must be approved by the major command operations and
flight safety officer.
9-6.4
Power and Control
RDM are typically connected to the runway edge lighting series circuit for the associated
runway, or established as a separate circuit. Connection to runway edge lighting
provides turning on and off with the runway lights. This can also be accomplished by
interlock if RDM are on a separate circuit.
9-7
ARRESTING GEAR MARKER
9-7.1
Purpose
Arresting Gear Markers (AGM) identify arresting gear pendant cables or barriers on the
operational runway surface. The RDM are located adjacent to the location of arresting
system cables on the runway. An AGM is shown in Figure 9-7.
9-7.2
Installation
Arresting pendant cables must be identified by AGM on both sides of the runway. The
AGM are located in line with the cable 3 meters (10 feet) and equidistant from the
runway edge. AGM are similar to Size 4 RDM, and are positioned 15-22.5 meters (50-
75 feet) from the runway edge. Where RDMs are installed, locate the AGMs in line with
the RDM, except where the pendant cable is within 6 meters (20 feet) of an RDM. In this
case relocate the RDM to be in line with the AGM and 1.5 meters (5 feet) outboard of
the AGM. The distance indicated is to the inside edge of the marker. If the arresting
gear is in the overrun, signs are not allowed but obstruction lights are required. See
Chapter 6. This is a common requirement for the BAK-15. Markers are oriented
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