The purpose of this competition is to repeatedly achieve specified flight times, and land as close as possible to a designated spot consistently over a series of three flights.
Prior to the first flight in the event, the Contest Director shall announce the location of the landing spot. The landing area must be kept clear of persons or other obstacles to a safe landing.
The achieved duration of the model shall be divided by the target duration, and the result multiplied by 100. This figure shall 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 distance score shall be added to the time score and the contestant with the lowest total error summed over three flights shall be the winner.