# The Merchant Shipping (Boatmasters' Qualifications, Crew and Hours of Work) Regulations 2015, Regulation 42: Interpretation of Part 4


(1) In this Part—
“hovercraft” has the meaning given in section 4(1) of the Hovercraft Act 1968 ;
“rest period” means any time when a master is not on duty;
“working day”, in relation to a master, means either—
(a)where a period of duty is not followed by a rest period of at least 8 hours, the aggregate of—
(i)that and each successive period of duty, and
(ii)any intervals between those periods of duty,
until there is a rest period of at least 8 hours; or
(b)a period of duty which is followed by a rest period of at least 8 hours.
(2) In this Part, a master is on duty where the master —
(a) has nautical responsibility for a vessel or hovercraft in circumstances where this Part applies, and
(b) is otherwise engaged in work for the purposes of a trade or business carried on by the master, being work in connection with a vessel or hovercraft to which this Part applies or with any passenger carried by that vessel or hovercraft.

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Source: https://www.legislation.gov.uk/uksi/2015/410/regulation/42 (the official version)
Page: https://openlegislation.uk/merchant-shipping-boatmasters-qualifications-crew-and-hours-of-work-regulations-2015/regulation-42
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.