A top-down view of a drone site with north at the top. A drone, the remote pilot and an observer are at the site, and a helicopter holds a fixed position to the north-east. A clock dial around the site turns so that 12 o'clock always points the way the chosen reference faces. Measured from the drone's nose, the helicopter is at 2 o'clock. Measured from the way the pilot is facing, the same helicopter is at 10 o'clock. Measured from the way the observer is facing, it is at 7 o'clock. Its compass direction stays north-east the whole time. Clock code is relative to a reference, so agree the reference before flight and add plain language. Choose a reference with the buttons, and turn it with the facing slider. The scene is not to scale, and the headings are example values.
