# Precision Altitude

**27.1 Scope**- Precision Altitude comprises three events open to any model rocket. The purpose of this competition is to accurately predict the altitude that an entry will attain.

**27.2.1 Predicted Altitude**- The minimum altitude prediction allowable is 100 meters. The competitor must predict in meters the altitude to which their entry will be flown. A competitor at a meet must record their altitude prediction on the flight card prior to any official flight.

**27.2.2 Set Altitude**- The Contest Director must set the target altitude when the meet is sanctioned. This value must appear in the sanction form and all appropriate contest information. The target altitude must be a multiple of 5 meters between 100 and 300 meters.

**27.2.3 Random Altitude**- The Contest Director must randomly select the target altitude just prior to when the event is flown, by random selection. The target altitude must be a multiple of 5 meters between 100 and 300 meters.

**27.4 Number of Flights**- Entries must be allowed only one official flight in Precision Altitude. If no altitude data is available, any re-flight must be made by the same entry, and no changes in configuration, motor type, or prediction must be allowed.

**27.5 Control**- The entry must not be radio controlled or contain any device whose purpose is to control the altitude of the entry.

**27.6 Scoring**- Precision Altitude Competition must be scored as follows: the entry’s achieved altitude must be divided by its target altitude, and the result multiplied by 100. This figure must then be rounded to the nearest 0.1%. If the result is greater than or equal to 100, subtract 100 from it; otherwise, subtract it from 100. The competitor whose score comes closest to zero is declared the winner.