Section 2. Visual Signals

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    Section 2. Visual Signals

    3-2-1. LIGHT SIGNALS

    Use ATC light signals from TBL 3-2-1 to control aircraft and the movement of vehicles, equipment, and personnel on the movement area when radio communications cannot be employed.

    TBL 3-2-1 ATC Light Signals
    Meaning
    Color and type of signal Aircraft on the ground Aircraft in flight Movement of vehicles, equipment and personnel
    Steady green Cleared for takeoff Cleared to land Cleared to cross; proceed; go
    Flashing green Cleared to taxi Return for landing (to be followed by steady green at the proper time) Not applicable
    Steady red Stop Give way to other aircraft and continue circling Stop
    Flashing red Taxi clear of landing area or runway in use Airport unsafe- Do not land Clear the taxiway/runway
    Flashing white Return to starting point on airport Not applicable Return to starting point on airport
    Alternating red and green General Warning Signal- Exercise Extreme Caution General Warning Signal- Exercise Extreme Caution General Warning Signal- Exercise Extreme Caution

    3-2-2. WARNING SIGNAL

    Direct a general warning signal, alternating red and green, to aircraft or vehicle operators, as appropriate, when:

    NOTE: The warning signal is not a prohibitive signal and can be followed by any other light signal, as circumstances permit.

    1. Aircraft are converging and a collision hazard exists.
    2. Mechanical trouble exists of which the pilot might not be aware.
    3. Other hazardous conditions are present which call for intensified pilot or operator alertness. These conditions may include obstructions, soft field, ice on the runway, etc.

    3-2-3. RECEIVER-ONLY ACKNOWLEDGMENT

    To obtain acknowledgment from an aircraft equipped with receiver only, request the aircraft to do the following:

    1. Fixed-wing aircraft:
      1. Between sunrise and sunset:
        1. (a) Move ailerons or rudders while on the ground.
        2. (b) Rock wings while in flight.
      2. Between sunset and sunrise: Flash navigation or landing lights.
    2. Helicopters:
      1. Between sunrise and sunset:
        1. (a) While hovering, either turn the helicopter toward the controlling facility and flash the landing light or rock the tip path plane.
        2. (b) While in flight, either flash the landing light or rock the tip path plane.
      2. Between sunset and sunrise: Flash landing light or search light.
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