Transmission shall be conducted concisely in a normal conversation tone; full use shall be made of standard phraseologies.
Speech transmitting technique should be such that the highest possible intelligibility is incorporated in each transmission. Fulfilment of this aim requires that pilot should:
- enunciate each word clearly and distinctly;
- maintain an even rate of speech not exceeding 100 words per minute. A slight pause preceding and following numerals makes them easier to understand;
- maintain the speaking volume at a constant level;
- be familiar with the microphone operating techniques and suspend speech temporarily if it becomes necessary to turn the head away from the microphone.
Runway in use, altimeter settings, SSR codes, level instructions, heading and speed instructions and transition level shall be read back:
Note: If the level of an aircraft is reported in relation to standard pressure 1013,2 hPa, the words “FLIGHT LEVEL“ precede the level figures. If the level of the aircraft is reported in relation to QNHor height above ground, the figures are followed by the word “METRES“ or “FEET“, as appropriate.
TWR: “OK-ABC LINE UP RUNWAY TWO FOUR“
OK-ABC: „LINING UP RUNWAY TWO FOUR, OK-ABC.“
6.1.1Word spelling alphabet
Word spelling alphabet is to be used at all times when it is required to indicate letters except for a particular letter group which by every-day use have become unmistakable, e.g. QNH, etc.
184.108.40.206English world spelling alphabet as presented in table below should only be used during radio communication.
|Letter||Word||Pronunciation in CR||International pronunciation|
|I||India||indiə||IN DEE AH|
|J||Juliett||džu:li’et||JEW LEE ETT|
|N||November||nəu’vembə||NO VEM BER|
|R||Romeo||rəumiəu||ROW ME OH|
|S||Sierra||si’erə||SEE AIR RAH|
|U||Uniform||ju:nifo:m||YOU NEE FORM|
This English world spelling alphabet shall be always used when it is necessary to pronounce letters, with the exception of group of letters which are used daily and can not be interchangeable (e. g. ILS, QNH, ETA etc.).
Numbers shall be transmitted using the following English pronunciation:
|Number||Czech word||English word||Pronunciation||International pronunciation|
220.127.116.11Transmission of numbers in radiotelephony:
All numbers except as prescribed below shall be transmitted by pronouncing each digit separately:
|Aircraft call sign OK 2385||OSKAR KILO TWO THREE EIGHT FIVE|
|Heading 080 degrees||HEADING ZERO EIGHT ZERO|
|Wind direction and speed 200 degrees 70 knots||WIND TWO ZERO ZERO DEGREES SEVEN ZERO KNOTS|
|Transponder code 4203||SQUAWK FOUR TWO ZERO THREE|
|Runway in use 30||RUNWAY THREE ZERO|
|Altimeter setting QNH 1010||QNH ONE ZERO ONE ZERO|
The exception from above mentioned rule is created by numbers used in the transmission of:
- cloud height and
which contain whole hundreds and whole thousands, and which shall be transmitted by pronouncing each digit in the number of hundreds or thousands followed by the word HUNDRED or THOUSAND as appropriate.
Combinations of thousands and whole hundreds shall be transmitted by pronouncing each digit in the number of thousands followed by the word THOUSAND followed by the number of hundreds followed by the word HUNDRED.
|Altitude 800 ft||EIGHT HUNDRED FEET|
|3 400 ft||THREE THOUSAND FOUR HUNDRED FEET|
|12 000 ft||ONE TWO THOUSAND FEET|
|Cloud height 1 200 m||ONE THOUSAND TWO HUNDRED METRES|
|Visibility 700 m||VISIBILITY SEVEN HUNDRED|
|Visibility 1000 m||VISIBILITY ONE THOUSAND|
Numbers containing a decimal point shall be transmitted with the decimal point being indicated by the word DECIMAL:
|Number (e.g. frequency) 120.3||ONE TWO ZERO DECIMAL THREE|
6.2Selected radiotelephony procedures
6.2.1Establishment of contact
The initial call made to establish RTF contact should take the following form:
- the full RTF call sign of the station being called;
- the full RTF call sign of the station calling.
Note: Full call sign is a call sign which hasn`t been abbreviated.
Note: Further below there are the next potential obligatory items of communication necessary to be used during establishment of communications.
|Aerodrome control tower (aerodrome control unit)||TOWER|
|Approach control office||APPROACH|
|Area control centre||CONTROL|
|Flight Information Centre||INFORMATION|
|AFIS Unit (Aerodrome Flight Information Service Unit)||INFO|
|Aerodrome unit providing information to known traffic (aeronautical station)||RADIO|
6.2.2RTF procedures used at uncontrolled aerodromes and within ATZ
This part of phraseology is intended to be used as a guide use by VFR pilots on uncontrolled aerodromes and within ATZ.
18.104.22.168Call sign of the AFIS unit consists of the name of the aerodrome and expression INFO (see the table here above).
Call sign of the unit providing information to known traffic at the non-AFIS aerodrome consists of the name of the aerodrome and expression RADIO (see the table here above).
Note: In radiotelephony contact with AFIS units and with units providing information to known traffic at uncontrolled non-AFIS aerodromes it is not allowed to use the call sign TOWER even in cases an AFIS unit has been located physically at the aerodrome tower. The call sign TOWER is used to indicate the ATC service provided at the aerodrome (see the table here above).
22.214.171.124The aircraft when operating on an uncontrolled aerodrome and within an ATZ shall report on an appropriate frequency assigned and published for an individual aerodrome:
- the type of aircraft,
- altitude and
- intended flight or ground activity, as appropriate,
regardless whether the aerodrome flight information service is provided or somebody replies.
Other aircraft at the aerodrome or within ATZ have to be listening to the same frequency and shall use this information to avoid collisions.
Note: The structure of report of the aircraft departing and arriving at an uncontrolled aerodrome or transiting ATZ is depicted in chapter Visual Flight Rules of this manual, in the article Operation on uncontrolled aerodromes and within Aerodrome Traffic Zone (ATZ).
126.96.36.199Examples of phraseology used at an uncontrolled aerodrome and within ATZ
- commencement of taxiing and activity after departure:
KOLÍN RADIO, OKABC, CESSNA 172 IN FRONT OF HANGAR, TRAINING FLIGHT, LEFT CIRCUITS (AERODROME CIRCLING) RUNWAY 06, TAXIING TO HOLDING POINT RUNWAY 06
AEROBATICS (ACROBATIC) FLIGHT
PARACHUTE DESCENT(S) or JUMPS
- intention to cross or backtrack the runway:
KOLÍN RADIO OK ABC BACKTRACK / CROSSING RUNWAY 05 LEFT
- entering the runway:
KOLÍN RADIO, OK ABC AT HOLDING POINT, READY FOR DEPARTURE
KOLÍN RADIO OK ABC, LINING UP RUNWAY 06
KOLÍN RADIO OK ABC, TRAFFIC ZLIN 142 ON FINAL IN SIGHT, HOLDING POSITION
KOLÍN RADIO OK ABC TRAFFIC PIPER SENECA POSITION BASE LEG IN SIGHT, LINING UP, WILL MAKE IMMEDIATE DEPARTURE
KOLÍN RADIO OK ABC, GIVING WAY EUROSTAR IN FRONT OF ME
KOLÍN RADIO OK ABC, FOLLOWING GLIDER READY TO LAUNCH
- take-off run or take-off, turn after departure or direction of flight:
LETŇANY INFO OK ABC, READY FOR DEPARTURE, AFTER DEPARTURE RIGHT TURN TO ŘÍČANY ALTITUDE 2500 FEET, QNH 1015
LETŇANY INFO OK ABC, TAKING OFF / ROLLING
LETŇANY INFO OK ABC, AVOIDING THE TRAFFIC TO THE LEFT
- leaving the traffic circuit or ATZ:
LETŇANY INFO OK ABC, LEAVING TRAFFIC CIRCUIT / ATZ, MIKE, 300 METRES ABOVE GROUND
- the position of the aircraft prior entering an ATZ:
KOLÍN RADIO OK ABC, PASSING TEREZIN, 200 METRES ABOVE GROUND, ENTERING THE ATZ, WILL PROCEED TO THE DOWNWIND POSITION, LEFT CIRCUIT OF RUNWAY 31, FULL STOP LANDING / TOUCH AND GO
- intended position of entry to the aerodrome traffic circuit:
KOLÍN RADIO OK ABC, JOINING LEFT DOWNWIND POSITION RUNWAY 31 PROCEEDING TO LAND
KOLÍN RADIO OK ABC, FINAL RUNWAY 31
- after landing, vacating the runway:
KOLÍN RADIO OK ABC, RUNWAY VACATED
KOLÍN RADIO OK ABC, AFTER TOUCH AND GO / LOW PASS ABOVE RUNWAY, WILL CONTINUE DIRECT TO TEREZÍN / WILL MAKE NEXT CIRCUIT
6.2.3RTF procedures used at controlled aerodromes and within CTR
188.8.131.52Examples of phraseology used at controlled aerodromes and within controlled airspace
- Request on ATC clearance - departing VFR flight.
BRNO TOWER (GROUND) - OSKAR KILO ALFA BRAVO CHARLIE – CESSNA 172 – STAND GENERAL AVIATION – (WITHOUT FLIGHT PLAN TO MNICHOVO HRADIŠTĚ – EXIT POINT NOVEMBER – UP TO 1000 FEET ABOVE GROUND) – INFORMATION HOTEL QNH 1015 – REQUEST ATC CLEARANCE
- Request on ATC clearance - arriving VFR flight.
BRNO TOWER (GROUND) - OSKAR KILO ALFA BRAVO CHARLIE – CESSNA 172 – (FROM MNICHOVO HRADIŠTĚ WITHOUT FLIGHT PLAN TO BRNO TUŘANY) – POSITION TIŠNOV 1000 FEET ABOVE GROUND - ENTRY POINT NOVEMBER ESTIMATED TIME 35 – INFORMATION HOTEL QNH 1015 – REQUEST (ATC) CLEARANCE INTO CTR
- Request on ATC clearance - VFR flight transiting CTR.
BRNO TOWER (GROUND) - OSKAR KILO ALFA BRAVO CHARLIE – CESSNA 172 – (FROM MNICHOVO HRADIŠTĚ TO BRATISLAVA WITHOUT FLIGHT PLAN) – POSITION TIŠNOV 1000 FEET ABOVE GROUND - ENTRY POINT NOVEMBER, ESTIMATED TIME 35 – EXIT POINT SIERRA - INFORMATION HOTEL QNH 1015 – REQUEST TRANSIT THROUGH THE CTR
- Startup request if FPL has been submitted
PRAHA GROUND OK ABC APRON SOUTH - STAND 12 - REQUEST START UP - INFORMATION GOLF, QNH 1011
- Request on taxi clearance
PRAHA GROUND - OK ABC - REQUEST TAXI
- Repeating of taxi clearance
TAXI TO HOLDING POINT RUNWAY THREE ONE VIA (TAXIWAY) ROMEO LIMA
- ...when a departure from an intersection take-off position is requested by a pilot:
REQUEST DEPARTURE FROM RUNWAY THREE ONE FROM INTERSECTION WITH TAXIWAY PAPA
- ...if the pilot is not sure about taxi:
REQUEST DETAILED TAXI INSTRUCTIONS
- ...for helicopter operations:
REQUEST AIR-TAXIING FROM APRON SOUTH TO HELIPORT 2
- ...when backtrack along the runway is required
- ...if crossing the runway is requested
REQUEST CROSS RUNWAY ONE THREE
- ...conflicting traffic on taxiway
TRAFFIC BOEING 737 TRAVEL SERVICE IN SIGHT
GIVING WAY TO BOEING 737 TRAVEL SERVICE
- ...runway vacating
- ...response to the instruction expedite or slow down
EXPEDITING or SLOWING DOWN
- ...if instruction hold or hold short has been issued
HOLDING POSITION or HOLDING SHORT OF TAXIWAY LIMA
- Repeating of line up clearance
LINING UP RUNWAY THREE ONE
- Repetition of line up clearance when conditional clearance has been issued
ROGER – BEHIND BOEING 737 ON SHORT FINAL, LINING UP BEHIND
- ...if instruction line up and wait has been issued
LINE UP RUNWAY THREE ONE AND WAIT
- Repetition of take-off clearance
RUNWAY THREE ONE – CLEARED FOR TAKE-OFF
- Instruction for immediate take off
ROGER – TAKE-OFF IMMEDIATELY (RUNWAY THREE ONE)
UNABLE FOR IMMEDIATE DEPARTURE (DEPARTURE IN TWO MINUTES or VACATING RUNWAY)
- Response to cancel take-off clearance
HOLDING POSITION or STOPPING
- Request on departure instruction
REQUEST DEPARTURE INSTRUCTIONS
- Repeating of departure clearance
AFTER DEPARTURE TURN RIGHT TO NOVEMBER - CLIMB TO ALTITUDE 2500FT (QNH 1012)
- Request on turning
REQUEST RIGHT / LEFT TURN
- Airborne information
- SSR transponder
SQUAWK SEVEN THOUSAND
SQUAWK STAND BY
MODE S TRANSPONDER
- Traffic information
TRAFFIC (ZLIN 43) IN SIGHT
TRAFFIC (LEARJET) NEGATIVE CONTACT
CLEAR OF TRAFFIC
- Request for Straight-in approach
REQUEST STRAIGHT-IN APPROACH FOR RUNWAY TWO TWO
REQUEST LEFT CIRCUIT RUNWAY TWO TWO
- Report on entry to traffic circuit
ENTERING DOWNWIND POSITION (LEFT CIRCUIT) RUNWAY TWO TWO
- Confirmation on number to land
NUMBER TWO TO LAND (TRAFFIC ATR 72 IN SIGHT)
CONTINUE APPROACH – WILL REPORT DOWNWIND, BASE LEG or FINAL
(LEFT) DOWNWIND, (LEFT) BASE LEG, FINAL (OF RUNWAY TWO TWO).
- Request on landing clearance
REQUEST LANDING CLEARANCE
- Repeating of landing clearance
CLEARED TO LAND RUNWAY TWO TWO
- Request on instruction to taxi to apron
REQUEST TAXI INSTRUCTION TO APRON SOUTH
- Special traffic
REQUEST TOUCH AND GO
REQUEST LOW PASS
REQUEST FULL STOP
HOLD OVER NOVEMBER
REQUEST CROSSING RESTRICTED AREA LIMA KILO ROMEO 3 (LIBAVÁ)
- Special circumstances
MAYDAY MAYDAY MAYDAY OSKAR KILO ALFA BRAVO CHARLIE - STATE OF EMERGENCY
PAN PAN PAN PAN PAN PAN OSKAR KILO ALFA BRAVO CHARLIE REQUEST PRIORITY LANDING – HEART ATTACK ON BOARD.
NOSE / LEFT / RIGHT LANDING GEAR / WHEEL APPEARS UP – REQUEST VISUAL INSPECTION
ENGINE FAILURE / ENGINE FLAMEOUT / SHUTDOWN / ENGINE ON FIRE
REQUEST MEDICAL ASSISTANCE AND FIREFIGHTING ASSISTANCE