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AIM

10/12/17

5−6−12

National Security and Interception Procedures

TBL 5−6−2

Intercepting Signals

INTERCEPTING SIGNALS

Signals and Responses During Aircraft Intercept

Signals initiated by intercepted aircraft and responses by intercepting aircraft

(as set forth in ICAO Annex 2-Appendix 1, 2.2)

Series

INTERCEPTED Aircraft Signals

Meaning

INTERCEPTING Aircraft Responds

Meaning

4

DAY or NIGHT−Raising landing gear (if

fitted) and flashing landing lights while

passing over runway in use or helicopter

landing area at a height exceeding 300m

(1,000 ft) but not exceeding 600m

(2,000 ft) (in the case of a helicopter, at a

height exceeding 50m (170 ft) but not

exceeding 100m (330 ft) above the

aerodrome level, and continuing to circle

runway in use or helicopter landing area. If

unable to flash landing lights, flash any

other lights available.

Aerodrome

you have

designated is

inadequate.

DAY or NIGHT−If it is desired that the

intercepted aircraft follow the intercepting

aircraft to an alternate aerodrome, the

intercepting aircraft raises its landing gear

(if fitted) and uses the Series 1 signals

prescribed for intercepting aircraft.

If it is decided to release the intercepted

aircraft, the intercepting aircraft uses the

Series 2 signals prescribed for intercepting

aircraft.

Understood,

follow me.

Understood,

you may

proceed.

5

DAY or NIGHT−Regular switching on and

off of all available lights but in such a

manner as to be distinct from flashing

lights.

Cannot

comply.

DAY or NIGHT-Use Series 2 signals

prescribed for intercepting aircraft.

Understood.

6

DAY or NIGHT−Irregular flashing of all

available lights.

In distress.

DAY or NIGHT-Use Series 2 signals

prescribed for intercepting aircraft.

Understood.