Germany/Langen FIR/Free ATC simulator for Windows

Your frequency. Your traffic.

Work as an air traffic controller on real German airspace. Press push-to-talk, speak real ICAO phraseology, and the pilots read back.

Free.No ads.No in-app purchases.

Join the Discord(opens in a new tab)

No download yet. Follow development and talk to the developer on Discord.

APP · EDDF · 25LQNH 10130214Z
5101525LEDDFCFG2K030↓ 030 -07DLH427080↓ 050 -18A320 22 I210 H270 S220EWG7MK060↑ 110
TXLufthansa 4 2 7, descend 5000 feet, QNH 1013
Approach radar, Frankfurt. Arrivals for runway 25L.In-game screenshot
02 · Voice control

Talk to your traffic.

Speech recognition runs locally on your GPU. Prefer to type? Everything also works with a keyboard command line and the mouse.

  1. 01PTT

    Press push-to-talk

    Hold your PTT key. The frequency is yours.

  2. 02

    Speak real phraseology

    Standard ICAO, the way you would say it on frequency. Recognised on your own machine.

  3. 03RX

    The pilot reads back

    Synthesised radio voices answer – and sometimes get it wrong. Catch it.

LANGEN RADAR · RADIO LOG0214Z
02:14:07TXLufthansa 4 Alpha Bravo, descend 5000 feet, QNH 1013
02:14:10RXDescend 5000 feet, QNH 1013, Lufthansa 4 Alpha Bravo
02:14:31TXCondor 2 Kilo, turn left heading 250, reduce speed 210 knots
02:14:35RXLeft heading 250, speed 220, Condor 2 KiloREADBACK ERROR
02:14:38TXCondor 2 Kilo, negative, reduce speed 210 knots
02:14:41RXReduce speed 210 knots, Condor 2 Kilo
03 · Positions

Climb the controller ladder.

From Delivery to Center, like on VATSIM. Every position you are not working is staffed by simulated colleagues, so the airport around you stays alive.

DEL1/5

Delivery

IFR clearances, SIDs, squawks and startup approval.

Available
GND2/5

Ground

Pushbacks and taxi routes on the real Frankfurt layout.

Available
TWR3/5

Tower

Line-up, take-off and landing clearances. Go-arounds included.

Available
APP4/5

Approach

Radar vectors, sequencing and speed control onto the ILS.

Available
CTR5/5

Center

En-route traffic across the upper sectors.

In development
04 · Real airspace

Frankfurt, as the controllers see it.

Echo Delta is built on official aeronautical data from DFS, the German air navigation service provider. Langen and Frankfurt come first.

Tower view: the whole of Frankfurt.
Ground: the apron, aircraft drawn to scale.
Sectors
Real sectors and airspace boundaries.
Procedures
Real SIDs and STARs.
Aerodrome
Real stands, taxiways and hold-short points.
Routes
Flight plans along real airways.
Traffic
Real capacities and traffic volumes by time of day.
Regions
Langen / EDDF.

Aeronautical data: © DFS Deutsche Flugsicherung GmbH, licensed under CC BY 4.0 (creativecommons.org/licenses/by/4.0). The data has been adapted for use in the game.

05 · Features

What you work with today.

  • DELIVERY

    IFR clearances, SIDs, squawks and startup approval – plus readback errors you have to catch.

  • GROUND

    Pushbacks, taxi routes on the real taxiway layout, hold-short points and one-way flows.

  • TOWER

    Line-up, take-off and landing clearances, intersection departures, go-arounds, runway changes.

  • APPROACH

    Radar vectors onto the ILS, sequencing and speed control.

  • STCA & MVA

    Short-term conflict alerts and minimum vectoring altitudes.

  • RADAR

    Inspired by EuroScope and TopSky: data blocks, heading vectors, routes along real airways.

  • WIND & ATIS

    Wind, ATIS and runway direction changes during your shift.

  • 250 KT / FL100

    The speed limit below FL100 applies – to your clearances too.

  • REAL VOLUMES

    Real capacities and traffic volumes by time of day.

  • FREE PLAY

    No game over. Incidents are logged; every shift ends with a graded report, A–F.

In developmentCenter position·Career with lessons and checkouts
Shift report, graded A.
06 · Shift report

Every shift gets a grade.

No game over – the traffic keeps coming. When you hand over, you get a report on how you worked.

SAFETY
Separation, conflicts, incidents.
CORRECTNESS
The right clearance, at the right time.
PHRASEOLOGY
ICAO phrasing and readbacks you caught.
EFFICIENCY
Flow, delays and runway use.
07 · Free, for real

Free. Not free-to-play.

  • No ads.Not in the menu, not between shifts.
  • No in-app purchases.Every position, every feature.
  • No account.Download, start, plug in.
  • No mobile app.A desktop sim for Windows.

Echo Delta is made by one aviation enthusiast who wanted this sim to exist. That is the whole business model.

Follow development

Stand by for release.

There is no download yet. Join the Discord and you hear first when the frequency opens – plus development news, previews and a direct line for feedback.

Join the Discord(opens in a new tab)
Main menu.
08 · Requirements

What you need.

SYSTEM
Windows, 64-bit
MICROPHONE
Headset or desk mic, with a push-to-talk key
GPU
Recommended – speech recognition runs locally on it
DETAIL
Minimum and recommended specs – to be announced
09 · FAQ

Say again?

Is it really free?

Yes. No ads, no in-app purchases, no account, no premium tier.

Does it work with a German accent?

Echo Delta listens for standard ICAO phraseology in English, spoken by controllers who are not native speakers – which is most of them.

Can I play without a microphone?

Yes. Every instruction can also be given on the keyboard command line or with the mouse.

Is there a career?

Not yet. A career with lessons and checkouts is in development. Today you work in free play, from Delivery up to Approach.

Do I need a VATSIM account?

No. Echo Delta runs on its own, offline from any network, and uses official DFS aeronautical data. No account of any kind.

Which airports can I work?

Frankfurt (EDDF) in the Langen FIR.