ILS Critical Area Boundary Signs
Yellow sign with a black depiction of the ILS critical area marking — the edge of the ILS critical area.
3 signs · Start from a blank ils critical area boundary sign →
About ils critical area boundary signs
The ILS critical area boundary sign faces pilots leaving the ILS critical area. It's a picture of the ILS holding position marking — two solid bars joined by pairs of rungs, like a ladder — black on yellow. Once the whole aircraft is past it, the aircraft is clear of the critical area. It stands back to back with the ILS holding position sign.