U.S. Deporrrnenr of Trons~lion F&emlAvlatkM Admlnistmtion Circular - ~- Subject: LIGHT GUX SIGNALS FROM THE IMe: o/25/94 AC No: 90-67B COSTROL TOWER FOR GROUND Initiated by: ATP-120 Change:
VEHICLES, EQVIPMENT, AKD PSRSOKh'EL
1. P' RPOSE: This advisory circular !A;! provides information with respect to the meaning of light gun signals used by air trtific control tower personnel in communicating to ground v,;l.icles, equipment operators, and :;ersonnel on the airport movement area.
2 1 CANCELLATION: AC 90-67A, Light Gun Signals from the Control Tower for Ground Vehicles, Equipment, and Personnel, dated 6/25/81 is cancelled.
3. AELA'PED DOCUMENJTS: Order 7110.65, Air Traffic Control:
Air.nanJs Information Manual; Federal Aviation Regulations (FAR)
91.125, ATC Light Signals: Order 7210.3, Facility Operation and Administration: and FAR 139.329, Ground Vehicles.
4. BACKGROUND: This AC informs the aviation community that airport traffic control towers (ATCT) use light gun signals to control ground vehicles, personnel, and equipment operators that are not radio-equipped, or that have malfunctioning radio equipment. Vehicles not radio-equipped should make arrangements with the ATCT through airport management prior to proceeding to any movement area. These signals are basically the same as those used to controi aircraft on the ground.
5. PROCEDURE: The primary use of the light gun is to convey instructions when radio communications cannot be conducted due to an equipment malfuncton. Personnel, and individuals operating vehicles and equipment on airport movement areas should understand the meanings of light gun signals used by ATCT's and use extreme caution and vigilance to prevent inadvertently following light gun signals intended for aircraft. Personnel shculd always look in all directions before proceeding onto runways and movement areas used by aircraft. Airport managers and operators should establish safe operating practices for movement areas, including specific instructions on when and where to exit movement areas due to an equipment malfunction and when and where to look for light gun signals from the tower. All FAA Form 1320-15 (4-82) Supersedes WA Form 1320-2
ground equipment and vehicles should be placarded with a description of the signals and meanings. Light gun signals and meanings are explained in the attached Appendix 1, Air Traffic Control Tower Light Gun Signals.
Lane Speck Air Traffic Rules and Procedures Service Par 5 . - -__- -.-.- Page 2
g/25/94 AC 9%67B APPEKDIX 1
AIR TRAFFIC CONTROL TOWER LIGHT GUN SIGNALS r
MEANING
COLOR AND TYPE VEHICLES, EQUIPMENT AIRCRAFT ON THE
OF SIGNAL AND PERSONNEL GROUND Steady Green Cleared to cross, proceed or go Cleared for takeoff Flashing Green N/A Cleared to Taxi Steady Red STOP I STOP Flashing Red Clear the taxiway or runway Taxi clear of the runway in us2 Flashing White Alteriating Red and Green Return to starting Return to starting point on airport point on airport Exercise extreme caution Page 1 (and 2)