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AIM

10/12/17

2

−3−22

Airport Marking Aids and Signs

FIG 2

−3−28

Holding Position Sign for ILS Critical Area

FIG 2

−3−29

Sign Prohibiting Aircraft Entry into an Area

3. ILS Critical Area Holding Position

Sign. At some airports, when the instrument landing
system is being used, it is necessary to hold an aircraft
on a taxiway at a location other than the holding
position described in Paragraph 2

−3−5, Holding

Position Markings. In these situations, the holding
position sign for these operations will have the
inscription “ILS” and be located adjacent to the
holding position marking on the taxiway described in
paragraph 2

−3−5. An example of this sign is shown

in FIG 2

−3−28.

4. No Entry Sign. This sign, shown in

FIG 2

−3−29, prohibits an aircraft from entering an

area. Typically, this sign would be located on a
taxiway intended to be used in only one direction or
at the intersection of vehicle roadways with runways,
taxiways, or aprons where the roadway may be
mistaken as a taxiway or other aircraft movement
surface.

NOTE

Holding position signs provide the pilot with a visual cue
as to the location of the holding position marking.

REFERENCE

AIM Paragraph 2

−3−5, Holding Position Markings