1. GLOSSARY OF TERMS

2. Phonetic Alphabet Transmission of Letters
International radio comms use the phonetic alphabet.
Phonetic spelling is only used if there is a chance of misunderstanding. When using an aircraft callsign, each letter is spoken separately. The phonetic alphabet is not used for Q-codes.

3. Transmission of Numbers

4. Transmission of Time
When transmitting the time only the minutes of the hour are normally required.
If there is a possibility of confusion include the hour as well.

5. Standard Words and Phrases

9. Common Abbreviations ABBREVIATION - MEANING
Abbreviations are spoken using the constituent letters.
ABBREVIATION - MEANING
ACC - Area control centre or area control
ADF - Automatic direction finding equipment
ADR - Advisory route
AFIS - Aerodrome flight information service
AGL - Above ground level
AlP - Aeronautical information publication
AIS - Aeronautical information service
AMSL - Above mean sea level
ATC - Air traffic control
ATD - Actual time of departure
ATIS - Automatic terminal information service
ATS - Air traffic service
ATZ - Air trafic zone

10. ABBREVIATION - MEANING
DME - Distance Measuring Equipment
EET - Estimated Elapsed Time
ETA - Estimated Time of Arrival
ETD - Estimated Time of Departure
FIC - Flight Information Centre
FIR - Flight Information Region
FIS - Flight Information Service
GCA - Ground Controlled Approach
H24 - Continuous Day and Night Service
HF - High Frequency ( MHz)
HJ - Sunrise to Sunset
HN - Sunset to Sunrise
HS - Service Available During Hours of Scheduled Operation
HX - No Specific Hours

11. ABBREVIATION - MEANING
IFR - Instrument Flight Rules
ILS - Instrument Landing System
IMC - Instrument Meteorological Conditions
INFO - Information
INS - Inertial Navigation System
LORAN - Long Range Navigation System
MET - Meteorology
MLS - Microwave Landing System
NDB - Non-directional Beacon
NIL - None
NOTAM - A notice which is essential to personnel concerned with flight operations
PAPI - Precision Approach Path Indicator
QFE - Atmospheric Pressure at Aerodrome Elevation

12. ABBREVIATION - MEANING
QNH - Altimeter setting to obtain elevation when on ground
RCC - Rescue Co-ordination Centre
RNAV - Area Navigation
RVR - Runway Visual Range
SID - Standard Instrument Departure
SIGMET - Information concerning en-route weather phenomena
SSR - Secondary Surveillance Radar
STAR - Standard (instrument) Arrival
TACAN - UHF Tactical Air Navigation Aid
TMA - Terminal Control Area
UHF - Ultra-high Frequency ( MHz)

13. ABBREVIATION - MEANING
UTA - Upper Control Area
UTC - Co-ordinated Universal Time
VASI - Visual Approach Slope Indicator
VDF - VHF Direction Finding Station
VFR - Visual Flight Rules
VHF - Very High Frequency ( MHz)
VIP - Very Important Person
VMC - Visual Meteorological Conditions
VOR - VHF Omni-directional Beacon
VORTAC - VOR and TACAN Combined