holding line marking without a control tower clearance. Category II holding position
markings consist of two parallel continuous strips 12 inches wide and 24 inches apart
and perpendicular to the taxiway together with double 12 inch wide connecting lines at
10-foot intervals (see Figure 4-3).
Figure 4-3 -- Standard holding position markings.
Tactical Air Navigation (TACAN) Checkpoint Markings
TACAN checkpoint markings should be located on the taxiway centerline near the
runway threshold, but far enough away from runway edge for the checkpoint sign to be
outside the holding position area. The center of the TACAN checkpoint marking will not
be less than 262.5 feet from the runway edge. The circle is 20 feet in diameter with the
marking 12 inches wide. The marking is nonretroreflective yellow. An arrow is provided
across the circle through the center of the desired azimuth and extends outside the
circle for another 20 feet, when aircraft are to be aligned in a specific direction towards
the transmitter antenna for the check. The arrow is also nonretroflective yellow with the
shaft being 12 inches wide and the arrowhead 6 feet long and 3 feet wide (see Figure 4-
4).
4-11
