The VOR is being switched off — and you still have to master it. Across Europe, the move to Performance-Based Navigation (PBN) is steadily thinning out the old network of ground beacons. Yet the VHF Omnidirectional Range sits squarely inside EASA subject 062, Radio Navigation, and it is examined in full under ECQB2026, live since 1 August 2026.
Why keep testing a dying technology? Because when GNSS is jammed or fails, aircraft fall back on conventional navaids. Examiners know it, so they keep asking — and so should you.
This guide breaks down how the VOR actually works, how to read the needle, and the error traps that quietly cost marks.
What a VOR actually is
A VOR is a ground station transmitting in the VHF band between 108.00 and 117.95 MHz. It lets any aircraft with a VOR receiver measure its bearing to or from the station, referenced to magnetic north.
The station radiates two 30 Hz signals. One is a reference phase that is identical in every direction. The other is a variable phase whose timing depends on the compass direction from the station. Your receiver compares the two, and the phase difference between them is your radial.
The two signals are designed to be exactly in phase when you are due magnetic north of the station, and progressively out of phase as you move around it. A 90-degree phase difference therefore means you are on the 090 radial, due east of the station.
Conventional VOR vs Doppler VOR
An older conventional VOR (CVOR) creates the variable signal with a rotating radiation pattern. A modern Doppler VOR (DVOR) — like the one below — uses a wide ring of fixed antennas and simulates that movement electronically. The DVOR is far less sensitive to reflections from terrain and buildings, so its bearings are cleaner. Importantly, the airborne receiver reads both types in exactly the same way.
Radials, TO/FROM and reading the needle
Everything a VOR tells you is built on the radial: a magnetic bearing measured from the station. There are 360 of them, one per degree.
In the cockpit you work the VOR through three things:
- OBS (Omni Bearing Selector) — the course you dial in.
- CDI (Course Deviation Indicator) — the needle showing whether that course lies left or right of you.
- TO/FROM flag — whether flying the selected course would take you toward or away from the station.
The single most important exam point: a VOR indication is independent of aircraft heading. Point the nose wherever you like. If the OBS reads 360, the needle is centred and the flag shows FROM, you are on the 360 radial. The instrument reports geometry, not where the aircraft happens to face.
How sensitive is the needle?
On a VOR, full-scale CDI deflection represents roughly 10 degrees off the selected course, with each dot worth about 2 degrees (illustrative standard values). That is far coarser than an ILS localiser — a contrast examiners love. It also means VOR guidance fans out: the same angular error puts you much further off-track far from the station than close in.
The errors that cost marks
Radio Navigation questions rarely ask you to admire the VOR. They ask where it goes wrong:
- Line-of-sight range. VHF does not bend around the Earth, so usable range grows with altitude and is blocked by high terrain. Low and far behind a ridge, you get nothing.
- Cone of confusion. Directly above the station lies a cone of no usable signal. The needle swings and the TO/FROM flag drops out — that is normal station passage, not a fault.
- Site and scalloping errors. Reflections from ground, buildings or trees distort the bearing, sometimes as rapid fluctuations called scalloping. A DVOR sharply reduces this.
- Aggregate accuracy. Combining ground and airborne tolerances, plan on overall VOR accuracy of about plus or minus 5 degrees. Treat the radial as a corridor, not a laser line.
Why the VOR still matters in the PBN era
Regulation (EU) 2018/1048 pushes most European operations onto PBN by 6 June 2030, and air navigation service providers are rationalising the conventional beacon network to cut cost. But EASA is deliberately keeping a reduced, reversionary network of VORs and other navaids as a contingency for when GNSS is unavailable or jammed — a risk that is rising, not falling.
For you, the takeaway is simple. The VOR sits inside the ECQB2026 Radio Navigation syllabus, it underpins many General Navigation and Instrumentation questions, and it is your backup when the satellites let you down. Master the phase principle, learn to read the needle without any reference to heading, and know the errors cold. That trio answers most VOR questions you will ever meet.
Frequently asked questions
Is the VOR still in the EASA ATPL exam in 2026?
Yes. The VOR is part of subject 062 Radio Navigation and remains fully examinable under ECQB2026, which applies to all EASA ATPL, CPL and IR theory exams sat on or after 1 August 2026.
What is a VOR radial?
A radial is a magnetic bearing measured from the VOR station. There are 360 radials, one per degree. The 090 radial, for example, runs due magnetic east from the station.
Does a VOR reading change with aircraft heading?
No. The CDI and TO/FROM indication depend only on your position relative to the station and the course set in the OBS — never on the direction the aircraft is pointing.
What is the difference between a VOR and a Doppler VOR?
They serve the same purpose and are read identically in the cockpit. A Doppler VOR uses a ring of fixed antennas to simulate motion electronically, which greatly reduces siting and terrain errors compared with a conventional VOR.
Ready to turn Radio Navigation into easy marks? Practise VOR, ILS and RNAV questions with full worked explanations at ATPL Training.
Photo by Rinald Rolle on Unsplash
