Helicopter radio communication guide
Talking to ATC is the single skill most student pilots underestimate — and the one that separates confident pilots from tense ones. This guide walks you through EASA/ICAO phraseology, sample helicopter radio calls for every phase of flight, and the pitfalls to avoid before your first solo.
Why radio matters
The radio is your primary tool for staying safe in shared airspace. Every transmission has one job: to make sure the controller knows who you are, where you are, and what you intend to do — and that you have correctly understood their instructions.
Good phraseology is not about sounding professional. It is about being brief, clear and unambiguous so that a controller managing eight aircraft simultaneously can process your call in under two seconds and move on.
The radio operator licence
Every pilot who flies or trains in Czech airspace must hold a radio operator licence — and must have it in hand before the first solo flight. The licence authorises you to operate an aircraft radio station on board. Training for it is part of PPL(H) theory; only the exam itself is a separate step.
Two types of licence: OFL vs VFL
Both licences are issued by the Czech Telecommunication Office (ČTÚ). Choose based on where you plan to fly:
OFL — Restricted radio operator
Valid only inside the Czech Republic. Written test plus a short oral exam, both in Czech.
VFL — General radio operator
Valid internationally. Required for any cross-border flight or training abroad. We recommend going straight for the VFL if you ever plan to leave Czech airspace.
Three ways to obtain the licence
- 1.
ČTÚ exam in Prague or Ostrava
The classic route. Exams take place roughly once or twice a month at the ČTÚ offices. Written test plus an oral part; VFL candidates continue with an English interview covering phraseology, communication, and ATIS listening. The fee (~CZK 600) is paid directly to ČTÚ. Booking is required in advance. Only for Czech speaking applicants.
- 2.
Recognition of an EU exam
Suitable especially for non-Czech-speaking pilots. Present a valid radio operator certificate from another EU member state to ČTÚ and they will issue the Czech VFL on that basis — no local exam needed.
- 3.
Online exam with our partner (fastest route)
For students on a tight schedule, students approaching their first solo, or anyone who does not want to travel to Prague or Ostrava, we recommend the online exam with our partner organisation in the Netherlands. The exam is fully in English, held over video call from our classroom or your home, takes around 30 minutes, and skips the written test entirely. You receive the certificate on the spot and ČTÚ issues the VFL on that basis. Term availability is typically within a week of booking.
We handle the paperwork. You send us copies of a few documents by e-mail and we take care of the rest of the administration with ČTÚ.
ICAO alphabet & numbers
The phonetic alphabet exists because 'B' and 'D' sound almost identical over a scratchy VHF radio. Learn it until it is instinctive — you will spell your callsign, your position and every unusual name.
Numbers on frequency
Numbers are pronounced digit by digit — one two thousand five hundred not twelve thousand five hundred. A few digits have altered pronunciation to reduce confusion:
Call structure
Every radio call follows the same four-part structure:
- 1. Who you're calling — the station name (e.g. Král RADIO).
- 2. Who you are — your full callsign, with the prefix Helicopter on first contact.
- 3. Where you are — position, altitude, heading, or holding point as appropriate.
- 4. What you want — the request or the report.
After the controller replies you read back the clearance, always ending with your callsign. Then the loop starts again.
Sample calls for every phase of flight
Below is a complete VFR local flight in the Cabri G2 from Hradec Králové (LKHK). Callsign OK-LIO is fictional — replace with your training aircraft's registration.
1. Startup
2. Air taxi / hover taxi
3. Departure clearance
4. En route with FIS
5. Position report
6. Return and joining
Common phraseology terms
Helicopter-specific calls
Fixed-wing phraseology covers 95 % of what you will say, but a handful of terms are unique to rotorcraft. Master them early — they make life easier for controllers who see mostly aeroplanes.
If you are heading towards commercial rotorcraft work, phraseology becomes even more important — especially for HEMS operations and external sling load work, where non-standard clearances and off-airport operations are routine.
Emergency procedures
When something goes wrong, phraseology is your fastest tool for getting help. There are two urgency levels — memorise both and know when to use them.
MAYDAY × 3
Distress — grave and imminent danger, immediate assistance required.
"Mayday, Mayday, Mayday. Praha Information, Helicopter OK-LIO, engine failure, 3 miles north of Kolín, 1500 feet, autorotating, 3 persons on board, intentions land in field."
PAN-PAN × 3
Urgency — a serious concern, but no immediate danger. Priority handling requested.
"Pan-pan, Pan-pan, Pan-pan. Praha Information, Helicopter OK-LIO, unusual vibration in the tail rotor, request priority landing at Hradec Králové."
The universal emergency squawk is 7700, radio failure is 7600, unlawful interference is 7500. Setting the transponder is the fastest way to be seen by every radar controller in range.
Common student pilot mistakes
Talking before thinking
Plan the whole call before pressing the PTT. 'Who I'm calling, who I am, where I am, what I want.' Write it down on your kneeboard for the first flights.
Reading back too little
Every clearance and every runway, altitude, heading, QNH and transponder code must be read back. If you only say 'roger', ATC has to ask again.
Freezing on unexpected instructions
'Unable' is a valid answer. Better to ask for a different clearance than accept one you cannot fly safely.
Overloading the frequency
Do not transmit while someone else is speaking or if a transmission is in progress. Listen for 2–3 seconds before your first call.
Slurring numbers
Say numbers digit by digit ('one thousand five hundred' → 'one five zero zero feet'). QNH is always three digits ('one zero one three').
Skipping the callsign at the end
Every transmission ends with your callsign so ATC can identify who spoke — even a simple 'roger, OK-LIO'.
How to practise radio calls
Listen to LiveATC.net
Recorded feeds from real airports (LKPR, EDDF, EGLL) let you learn cadence and rhythm before you ever key the mic. Start with quiet regional towers, then move to busy control zones.
Chair-fly your calls
Sit at home with a headset, VFR chart and your kneeboard. Simulate every phase — startup, taxi, departure, en-route, arrival — and speak the calls out loud. Fluency comes from repetition.
Practise with your instructor
During briefings ask your instructor to role-play as ATC. Cover both routine calls and the awkward ones ('unable', 'say again', requesting a different runway).
Fly to controlled airports
As soon as your PPL(H) allows, plan navigation flights into controlled airspace. Nothing accelerates radio confidence like real transmissions with real controllers.
Frequently asked questions
Do student pilots need a radio licence to fly?
Yes. To transmit on an aeronautical frequency in Europe you need an FRTOL (Flight Radio Telephony Operator Licence) or its national equivalent. In the Czech Republic it is issued by the Czech Telecommunication Office after an English-language phraseology exam. Training for the exam is part of PPL(H) theory.
In what language do you speak on the radio in the Czech Republic?
At Czech-controlled airports (Prague, Brno, Ostrava, Karlovy Vary) English is used and required on some of them. At uncontrolled aerodromes with an AFIS or a common traffic frequency, Czech is common between Czech-speaking pilots — but English must always be available for international traffic.
What is the difference between 'roger' and 'wilco'?
'Roger' means 'I have received your last transmission'. 'Wilco' means 'I will comply' with the instruction. Do not combine them into 'roger wilco' — wilco already implies you received and understood.
When do I say 'Mayday' and when 'Pan-pan'?
Mayday (spoken three times) is for a distress condition — an immediate threat to life or the aircraft (engine failure, fire, forced landing). Pan-pan (also three times) is for an urgency condition — a serious problem that does not immediately threaten life, such as a passenger medical issue or a minor technical fault requiring priority handling.
How do helicopters call ATC differently from aeroplanes?
Helicopters use the callsign prefix 'Helicopter' before the registration on first contact, ask for hover taxi or air taxi instead of ground taxi, and can request direct routings from a non-standard point because they are not tied to runways.
What if I don't understand ATC?
Say 'Say again' to have the whole message repeated, or 'Say again <specific item>' for just one part (for example 'Say again QNH'). Never guess a clearance — a wrong readback is safer to correct than a wrong action in the air.
Learn to fly — and to talk on the radio
Radio phraseology is a core part of PPL(H) training at LionHeli. If you are still deciding whether to start, take a look at the first steps guide or a full cost breakdown.
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