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XC League Rules - Flights
Flight types, minimum distances, multipliers and other rules.

3 Flights

3.1 General

You can enter as many flights into the XC League as you like, but only your six best will count. The permissible types of flight can be split into three categories: Standard Flights, Circuit Flights and Declared Flights.

Standard Flights Circuit Flights Declared Flights
Open Distance Out and Return Flight to Goal
Turnpoint Flight Flat Triangle Out and Return
  FAI Triangle FAI Triangle

3.2 Minimum Distances

The minimum distances for flight types and leagues are shown below. These can also be seen by clicking the League Info link above each league table.

Flight Type Clubs National Overseas
Standard Flights 5km 10km 10km
Circuit Flights 5km 15km 15km
Declared Flights
Flight to Goal
FAI Triangle
25km 25km 25km
Out and Return 35km 35km 25km

3.3 Multipliers

Multipliers are awarded for Circuit and Declared Flights as these are generally more difficult to achieve. These can also be seen by clicking the League Info link above each league table.

Flight Type Minimum Score Clubs National Overseas
Circuit Flights - split into 3 scoring tiers
Out and Return
Flat Triangle
5km 1.2    
Out and Return
Flat Triangle
15km 1.3 1.3  
Out and Return
Flat Triangle
35km 1.8 1.8 1.2
FAI Triangle 5km 1.5    
FAI Triangle 15km 1.8 1.8  
FAI Triangle 25km 2.3 2.3 1.5
Declared Flights
Flight to Goal 25km 1.3 1.3 1.2
Out and Return 35km 2.3 2.3 1.5
FAI Triangle 25km 3.0 3.0 2.0

3.4 Coastal Flights

Coastal flights are defined as any flight along a ridge (natural or man-made) where the immediate feature upwind is undercliff, beach, the sea or a loch. Where the majority of the claimed flight distance is a coastal flight, the following rules apply:

  • Turnpoint flights are restricted to a single turnpoint, in addition to the start and finish points.
  • Multipliers will not be awarded.

Note that "claimed flight distance" refers to the part of your the flight between the start and finish points, which may be different to your takeoff and landing. This means that if you go XC from a coastal location, you could chose a start point on the coast then use three turnpoints for your flight inland.

3.5 Multiple Flights

There is no need to land between different flight types provided that your IGC tracklog shows the necessary details for each submitted claim. For example, you could complete a triangle then fly open distance, or fly two triangles without having to land in between. Note that for Declared Flights you can only declare one task per flight but you can fly it multiple times.

3.6 Triangle Criteria

An FAI Triangle must have no leg shorter than 28% of the total leg distance, and a Flat Triangle must have no leg shorter than 15% or longer than 45% of the total leg distance. The diagram below shows the triangle shapes that satisfy these requirements for a 100km triangle.

Triangle Criteria

3.7 Declaring a Flight

Declared Flights are Flights to Goal, Out and Return or FAI Triangle flights that are declared in advance. You can make your declaration in several ways:

Each of the message methods provides a timestamp for your declaration that will be valid for 24 hours, unless superseded by a later declaration. Note that a declaration in the IGC file is definitive and overrides any others.

For message methods it is the responsibility of the pilot to provide a declaration in the text format described below. Each element is described in the order it is required:

  • Your BHPA No
  • Start grid reference
  • optional turnpoint grid reference(s)
  • Finish grid reference
  • optional other BHPA No(s)

Each element must be separated by either a new line or a comma. The system is automated so it will not understand pictures of your declaration, turnpoint or place names or any other comments.

You can use either OS Landranger or Lat/Lon coordinates. For example, a Flight to Goal using OS Landranger coordinates would be declared as follows:

  • 12345, SO403919, SJ818215

Lat/Lon coordinates can either be in either Degrees Minutes Seconds (DMS), Degrees Decimal Minutes (DMM) or Decimal Degree format (DD) and you may omit the N/S/E/W designators using negative degrees for South and West. Whatever format is used, your coordinates must be clearly recognizable. For example, the above flight declaration using Degrees Decimal Minutes would be:

  • 12345, N52 31.281 W2 52.798, N52 47.415 W2 16.172

A single declaration can be made for more than one pilot by adding their BHPA Nos after the finish grid reference. For example:

  • 12345, SO403919, SJ818215, 12346, 12347

You can only declare one task per flight. If you make multiple separate flight declarations on one day only the last one submitted prior to the start of the attempted flight is valid. There is however no restriction on the number of declared flights that you can complete on a given day.

3.8 Height Loss

For declared Out and Return or FAI Triangle flights, a height loss rule applies that states that any loss of height between your start and finish must not exceed 2% of the distance flown. This FAI rule is designed to limit the advantage of your start altitude on smaller closed circuit tasks.

So if you are flying a 25km flight and you are at 1500m (cloudbase in the UK) when you leave your start cylinder, the lowest you can enter your finish cylinder is 1000m. Note that your heights are taken from the last time you leave your start cylinder and the last time you enter your finish cylinder.

3.9 IGC file Declarations

If your flight instrument writes C-records when you fly a task, then you may use your IGC file as proof of your declaration for all flights except record attempts. The following rules apply:

  • C-records override any other declarations made for the day.
  • The declaration can only be used with flight data in the IGC file.
  • The declaration must match the task being claimed.
  • Cylinder size is always taken as 400m radius.

Note that it is the responsibility of the pilot to understand how their instrument functions in terms of entering an appropriate task.

It is obviously not allowed to use unscrupulous methods to gain an unfair advantage, like flying with multiple instruments containing different declared tasks, for example. Any pilot suspected of cheating and witnessed using several flight instruments will be required to supply tracklogs from all instruments to corroborate their declaration.

3.10 Competition Declarations

If a recognized British competition sets an XC League declared task, you may use the official Sign-To-Fly sheet as proof of your declaration. A copy of this, or its equivalent, must be provided by the organizers and must contain the task date, coordinates, pilot names and BHPA Nos.

You must enter your flight using the Sign-To-Fly data, and include the competition name in the Additional Info box on the entry form.

Note to organizers: The number of turnpoints must exactly match those required for an XC League declared task, so additional timed or enroute turnpoints cannot be used. As such, this style of task may not be suited to racing competitions.