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| The ASCs will be responsible to define rules for measurements and calculations as established by the following provisions (the list is not exhaustive): |
| 7.1 Measurements |
| *7.1 Measurements* |
| * 7.1.2 General. The *methods and standards of precision for measuring and recording* of Position, Distance, Time, Altitude, Mass and other primary values, as well as equipment technical standards, shall be determined by each FAI Air Sport Commission and specified in the appropriate section of the Sporting Code. * 7.1.8 Mass. Mass shall be determined using scales and methods approved by the Air Sport Commission concerned. |
| 7.2 Calculations |
| *7.2 Calculations* |
| * 7.2.1 General. The *methods and standards of precision for calculating* Distance, Bearing, Altitude, Speed, and Scores shall be determined by each FAI Air Sport Commission and specified in the appropriate section of the Sporting Code. * 7.2.2 Earth Model. The Air Sport Commissions are responsible for the *specification of the basis of geometric calculations*. If not otherwise specified by the Air Sport Commissions, the earth model to be used for geometric calculations shall be the WGS84 ellipsoid. If a sphere is specified, it shall be the “FAI Sphere.” If a planar model is to be used, then the projection must be strictly defined. * 7.2.5 Altitude. The *methods for calculations of corrections to measured altitudes* (if required) shall be specified by the Air Sport Commissions. |
| 7.4 Approvals |
| *7.4 Approvals* |
| * 7.4.1 As an alternative to *specifying algorithms*, each Air Sport Commission may meet its obligation to specify computational methods by *approving specific flight evaluation and scoring programs*. If this method is used, then the ASC must implement procedures for testing, approval, and version control of the flight evaluation and scoring programs. |