(a) One compass is permitted mounted on any part of the deck or the cockpit, provided that the hull cavity is not pierced by anything other than the fasteners. Compasses shall not be fitted to inspection ports. Electronic and digital compasses are prohibited (see exception in part d).
(b) Any use of electronic equipment not specifically allowed in the rules is prohibited unless modified in the sailing instructions.
(c) Timing devices are permitted.
(d) A timing device that includes an electronic compass is permitted as long as it is worn on the wrist.