The ASSG is used in the slalom event for skiers with visual

impairment. The skier turns at the sound of a tone rather than
turning around a buoy. The tone is produced by the Audio Slalom
Signal Generator (ASSG). The ASSG measures the angle of the
rope in relation to the boat path and sounds a tone when the skier
has pulled far enough to the outside to simulate a turn around a buoy