Wave Boxes
Letters of Agreement
Temporary Restrictions, RA(T)
ASSelect UK
Output Format

Recommended output format is OpenAir. Tim Newport-Peace (TNP) format should be used with caution; it is not interpreted consistently by all software.


No-ATZ Airfield. Listed as training aerodromes in section ENR 5.5 of the AIP. (Most of the smaller airfields shown on the 1:500000 chart are not listed in the AIP and are not included by this app.)

Gliding Airfield. Listed in ENR 5.5 and given a radius of 1 nm.

Microlight Airfield. Listed in ENR 5.5 and given a radius of 0.5 m.

Obstacle. Only obstacles (mainly radio masts) with a height of greater than 600 ft are included.

ATZ. 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 Feather. Although not strictly airspace the BGA recommend a radio call if you are in the vicinity of a instrument approach and setting the airspace type to generate a warning. Note the feather is symbolic only - the instrument approach procedure extends outside the area shown on the chart.

Letters of Agreement, LoA

BGA LoAs are listed on the BGA website. A local briefing is required before using an LoA. (The CAMBRIDGE RAZ is a special case; it applies to everyone and is permanently enabled.)

Temporary Restrictions, RA(T)

RA(T)s are detailed in Mauve AICs on the NATS AIS website.


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 GitHub.

Comments, corrections and complaints to:
Alan Sparrow
Version: 1.3.6