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
Gliding Airfield. Listed in ENR 5.5 and given a radius of
Microlight Airfield. Listed in ENR 5.5 and given a radius of
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
A local briefing is required before using an LoA. (The CAMBRIDGE
RAZ is a special case; it applies to everyone and is permanently
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
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
Comments, corrections and complaints to: