Page 397 - PPL-engelsk 2025

Communication

4.9.1 Conditional clearance

A conditional clearance is issued by the station, after the call sign, starting with

the condition, followed by the clearance, for example:

➢ O-TZ behind departing DC 9 line up runway 29

behind and wait
no known traffic”
The readback of such a message must be done in the same order. That is, for

example:

➢ Behind departing DC 9 line up runway 29 behind and

wait OTZ

If you mistakenly started the readback with "Lining up RWY 29," the pilot in the

DC 9 would immediately block the brakes.

An aviation station's acknowledgment to an aircraft is done by stating the

aircraft’s call sign, followed by, if necessary, the aviation station's call sign, for

example OTZ or OTZ Herning Radio.

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Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 397