Navigational Rally — also known as a Time-Speed-Distance (TSD) Rally
A TSD Rally is an event where cars follow a prescribed route on public roads at a precise speed or need to arrive at a destination after a precise driving duration. This is an excellent form of competition, and requires only a sense of direction and the ability to read and follow instructions in order to compete. The winner is the one who has successfully negotiated the course with the minimum deviation from pre-set speeds and times. There are a number of checkpoints along the way and each leg of the Rally is scored separately.