Page 27 - GEN - 2025

VOLMET* Meteorological information for aircraft in flight.

VOR VHF omnidirectional radio range.
VORTAC* VOR and TACAN combination

4.3 Categories of Messages

By convention, messages are placed into categories so that if several need to be
sent, the highest priority messages are sent first.

This also applies to normal radio communications; for example, an aircraft

emergency call takes priority over a request for landing.

The messages have the following order of priority:

1) Distress (MAYDAY)
A condition of being threatened by serious and/or imminent danger and of

requiring immediate assistance.

2) Urgency (PAN PAN)

A condition concerning the safety of an aircraft etc but does not require
immediate assistance, including messages preceded by the medical

transports signal – PAN PAN MEDICAL

3) Direction Finding
Communications relating to Direction Finding

4) Flight Safety

Messages of immediate concern to an aircraft in flight. Meteorological advice
of immediate concern to aircraft in flight or about to depart. Other messages

to aircraft in flight or about to depart.

5) Meteorological Messages
Reports, forecasts and warnings.

6) Flight Regularity

Messages regarding - operation or maintenance of facilities servicing changes
in requirements for passengers and crew non routine landings aircraft parts

or materials changes in aircraft operating schedules.

GEN radio 2025 - Midtjysk Flyveskole 27