background image

6/17/21 

AIM 

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