AIM - RAC 4.3.11 Visual Signals
 

Visual signals used by the tower and their meanings are as follows:

TO AIRCRAFT ON THE GROUND:
1 SERIES OF GREEN FLASHES Cleared to taxi.
2 STEADY GREEN LIGHT Cleared for takeoff.
3 SERIES OF RED FLASHES Taxi clear of landing area in use.
4 STEADY RED LIGHT Stop.
5 FLASHING WHITE LIGHT Return to starting point on airport.
6 BLINKING RUNWAY LIGHTS

Advises vehicles and pedestrians to vacate runways immediately.

 

AIM RAC 4.5.7 Visual Signals

Visual signals used by the tower and their meanings are as follows:
 

TO AIRCRAFT IN FLIGHT:
1 STEADY GREEN LIGHT Cleared to Land
2 STEADY RED LIGHT Give way to other aircraft and continue circling.
3 SERIES OF GREEN FLASHES Return for landing. (This shall be followed at the proper time by a steady green light.)
4 SERIES OF RED FLASHES Airport unsafe; do not land.
5 THE FIRING OF A RED PYROTECHNICAL LIGHT (see note)

Whether by day or night and notwithstanding previous instructions, means do not land for the time being.

 


NOTE: Military control towers only.
Acknowledgement of Visual Signals – A pilot shall, where practicable, acknowledge
all clearances and instructions received by visual signals. Signals may be
acknowledged as follows:
(a) distinct rocking of aircraft in flight;
(b) at night, by a single flash of a landing light.