SCHEDULE 3 Aircraft equipment
3 (1) For the purposes of the Table in paragraph 5, flying time in relation to a helicopter or gyroplane shall be calculated on the assumption that it is flying in still air at the speed specified in the relevant flight manual as the speed for compliance with regulations governing flights over water.
(2) In this Schedule “day” means the time from half an hour before sunrise until half an hour after sunset (both times exclusive), sunset and sunrise being determined at surface level.