GM1 ADR-DSN.K.505 Signal panels and signal area

(a)A signal panels and signal area should be provided when visual ground signals are used to communicate with aircraft in flight.

(b)A signal panel and signal area may be needed when the aerodrome does not have an aerodrome control tower or an aerodrome flight information service unit, or when the aerodrome is used by aeroplanes not equipped with radio. Visual ground signals may also be useful in the case of failure of two-way radio communication with aircraft. It should be recognised, however, that the type of information which may be conveyed by visual ground signals should normally be available in AIP or NOTAM. The potential need for visual ground signals should, therefore, be evaluated before deciding to provide a signal area.

(c)ICAO Annex 2, Appendix 1, specifies the shape, colour and use of visual ground signals.