reg 10 Exception for emergencies
(1) The requirements for rest periods specified in regulation 9(5)(c) need not be maintained in case of any emergency or drill or in other overriding operational conditions. (2) Without prejudice to the generality of paragraph (1), a master of a ship or seaman may participate in a navigational, engine room or machinery watch although he has not had the rest period provided by the schedule produced in pursuance of regulation 9, and the master may exceed, and a seaman may be required to exceed, the schedule’s work or duty periods, when in the opinion of the master it is necessary to meet one of the following situations— (a) an emergency threatening the safety of the ship or the life of any person or threatening damage to the environment; (b) employment of the ship in the service of the Ministry of Defence at a time when the ship is operating in direct support of Her Majesty’s armed forces, or in direct support of the forces of any foreign power to which the United Kingdom is bound by any Treaty to provide operational support. (3) When in pursuance of paragraph (1) the master or a seaman has worked within a rest period provided for by the schedule, his name shall be entered in the record required to be maintained by regulation 9(10), together with the reason why he so worked.