Wave Boxes
Local Agreements
Temporary Restrictions, RA(T)

ASSelect UK

Up-to-date airspace data for mainland UK in OpenAir and TNP formats.

I have tried to make this data as accurate as possible, but there will still be errors. Good airmanship is your responsibility, not mine. Don't blame me if you go somewhere you shouldn't have gone while using this data.

Output Format

The recommended output format is OpenAir. Tim Newport-Peace (TNP) format should be used with caution; it is not interpreted consistently by all software. Competition format is intended for competition organisers only.

RA(T)s can be download separately from the main airspace by setting the Format to "OpenAir, RA(T) only". Your moving map can then be updated without changing the main airspace file.

Airspace Types

Unlicensed Airfields are aerodromes (without an ATZ) listed in section ENR 5.5 of the AIP. The majority of smaller airfields shown on the 1:500000 chart are not listed in the AIP and are not included by this app.

Gliding Airfields are listed in ENR 5.5 and are given a radius of 1 nm by ASSelect. Your home site is excluded if selected on the Opt tab.

Microlight Airfields are listed in ENR 5.5 and are given a radius of 0.5 nm by ASSelect.

Obstacles are listed in ENR 5.4. Only obstacles with a height of greater than 600 ft (mainly radio masts) are included by ASSelect.

ATZs. A radio call is required before entering an active ATZ. The BGA recommend setting them to Class D as a reminder. However setting them as Control Zones will also generate an airspace warning while distinguishing them from true Class D airspace.

ILS Feathers are not strictly an airspace type but the BGA recommend a radio call if you are in the vicinity. It's also recommended to set the airspace type to generate a warning on your moving map. Note the feather is symbolic only - the instrument approach procedure extends well outside the area of the feather.

Local Agreements

BGA letters of agreement are listed on the BGA website. With the exception of the Cambridge RAZ a local club briefing is required before using any local agreement.

Cambridge RAZ. The Cambridge Radio Advisory Zone (RAZ) is not controlled airspace. It's not mandatory but anyone flying in the vicinity of Cambridge airport is encouraged to make contact with Cambridge Approach before entering the RAZ. The RAZ is permanently enabled in ASSelect.
Note - Openair doesn't support a RAZ airspace type so a Radio Mandatory Zone (RMZ) type is used as a substitute.

Radio frequencies

Radio frequencies can be appended to the airspace name. Some frequencies may be missing - Please let me know if you spot something wrong.

Temporary Restrictions, RA(T)

RA(T)s are detailed in Mauve AICs on the NATS AIS website. RA(T)s can be downloaded separately from the rest of the airspace, see Output Formats above.


Airspace data is updated every four weeks - see Schedule. This site is normally updated approximately two weeks in advance of the effective date.

Release history summary, see here.

The airspace database can be downloaded from GitLab.

Comments, corrections and complaints to:
Alan Sparrow
Version: 1.8.3


NOTAMs are not included in the ASSelect data. Instead the four PDFs below show a summary of NOTAMs below FL100 relevant to cross country gliding.

Today's NOTAMs are refreshed once an hour; tomorrow's every six hours.

(01:01 Thu 04/03/21)
(01:01 Thu 04/03/21)
(01:02 Thu 04/03/21)
(01:02 Thu 04/03/21)