During the race a boat’s location must be determined by traditional star, sun, planet or moon sights. Navigators of boats competing using celestial navigation must at a minimum maintain, and have ready for inspection in Bermuda, the paper-based plotting sheets for the entire race which demonstrate the method of obtaining the vessel’s position at any time during the race. All fixes resulting from Lines of Position shall have recorded the GMT, altitude, azimuth and intercept of the body or bodies of each LOP. Any Local Apparent Noon fixes shall have GMT and altitude data recorded and available for inspection.

A yacht may elect to race using celestial navigation. If a yacht elects to be celestially navigated, she shall have her elapsed time reduced by 3%.