Buoyancy aids ON at all times. A boat need not be off her moorings at the preparatory signal. Any boat recrossing the finish line is automatically disqualified. The course is shown on a board in the clubhouse, both as a diagram and as a sequence of marks. The marks are placed clockwise round the reservoir, with 1 to the left as you face the water, going round to 9 on the right, with F in front of the clubhouse.
Odd numbers are orange spherical buoys, even numbers are yellow cans.
There's also a pink 'X' roughly in the middle which gets used sometimes. Don't get confused with the rescue boat moorings. Consult the sailing instructions for full details.