Information and Tips

This page contains links to useful information sources and tips for maintaining permit aircraft and managing a flight. Please comment with corrections and/or contributions of your own using the contact form at the foot of this page.

Maintaining Permit Aircraft

Pete’s Permit Talk

Notes from Phil Trangmar’s talk on the new permit procedures, April 2023

Flight Management Information on the Web


The Skyway Code

Access to key information for private pilots and includes:

Pilot responsibilities
Pre flight checks and flight planning
Airspace rules and regulations
Using aerodromes
Risks and Emergencies
Flying outside the UK
Links to useful safety and regulatory resources


Airspace Safety Initiative Downloads

NATS AIS printable documentation, e.g. Listening squawks and LARS

NATS Aeronautical Information Service (AIS)

Official source for UK aeronautical information.

NATS VFR Charts Information


New Frequency

An ‘unofficial’ website tracking changes to frequencies due to 8.33.


Forecasting services

MetCheck: aviation weather forecast for particular airfield.

MeteoCenter: European forecast based on the Weather Research and Forecast Modelling System (WRF)

Regional Atmospheric Soaring Prediction: weather forecasts for Great Britain

Windy: worldwide forecasting using the GFS and NEMS models.  Map is zoomable to a specific spot.


AOPA chart folding instructions

Downloads as a pdf: AOPA folding a half mil uk aeronautical chart


Cloud Base: Estimating Height of

If it is not currently precipitating or under an inversion, the height in feet of cloud base may be estimated given temperature, T  and dew-point, D by:

Temperature in Centigrade:   (T – D) * 400

Temperature in Fahrenheit:   (T – D) * 200

Other, more ‘accurate’ formulae exist; the above have the constant rounded to make for easy calculation and produce a more conservative (lower) result.

If dew-point is not available the minimum overnight temperature may be used.

Cloud Base: Forecasting Service

Ogimet: meteogram for a specific location.

WeatherOnline: using the GFS model


Maximum Drift

The maximum drift in degrees, for a given wind-speed in knots: W and true airspeed: A is:    (W * 60) / A

Heading Correction Estimation: The 1 in 60 rule

After 60 nautical miles travel, a 1 mile deviation from track equates to 1° error in heading and proportionately for larger deviations or shorter distances.

E.g. 2 miles deviation at 30 miles equates to a 4° error.

There is a Wikipedia entry with background on this tip.

Please add more content or correct what is here: