Aeronautical Information Manual (AIM), page 139

Index   138 -- Page 139 -- 140

FIG 2-3-34
ILS Critical Area Boundary Sign

4. ILS Critical Area Boundary Sign. This
sign has a yellow background with a black inscription
with a graphic depicting the ILS pavement holding
position marking as shown in FIG 2-3-34. This sign

is located adjacent to the ILS holding position

marking on the pavement and can be seen by pilots

leaving the critical area. The sign is intended to

provide pilots with another visual cue which they can

use as a guide in deciding when they are "clear of the
ILS critical area."

2-3-10. Direction Signs

a. Direction signs have a yellow background with
a black inscription. The inscription identifies the
designation(s) of the intersecting taxiway(s) leading
out of the intersection that a pilot would normally be
expected to turn onto or hold short of. Each
designation is accompanied by an arrow indicating
the direction of the turn.
b. Except as noted in subparagraph e, each
taxiway designation shown on the sign is accompa-
nied by only one arrow. When more than one taxiway
designation is shown on the sign each designation and
its associated arrow is separated from the other

taxiway designations by either a vertical message
divider or a taxiway location sign as shown in
FIG 2-3-35.

c. Direction signs are normally located on the left

prior to the intersection. When used on a runway to

indicate an exit, the sign is located on the same side

of the runway as the exit. FIG 2-3-36 shows a

direction sign used to indicate a runway exit.

d. The taxiway designations and their associated
arrows on the sign are arranged clockwise starting
from the first taxiway on the pilot's left.
(See FIG 2-3-35.)

e. If a location sign is located with the direction
signs, it is placed so that the designations for all turns
to the left will be to the left of the location sign; the
designations for continuing straight ahead or for all
turns to the right would be located to the right of the
location sign. (See FIG 2-3-35.)
f. When the intersection is comprised of only one
crossing taxiway, it is permissible to have two arrows
associated with the crossing taxiway as shown in
FIG 2-3-37. In this case, the location sign is located
to the left of the direction sign.

Airport Marking Aids and Signs 2-3-25

Page 139 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   138 -- Page 139 -- 140