11.—(1) A member of the light vessel service in the service of Trinity House who on the material date was in the service of, or was at any place except on land in the British Islands, in the course of proceeding to, or returning from service in, a lightship, lightship tender or lighthouse tender, shall be treated as holding on that date the equivalent naval rank which is specified in the appropriate Table in Schedule 4 to this Scheme in relation to the grade, or grade and circumstances, in which he was serving, or was due to serve, or had just ceased to serve, in the ship or tender, and the qualifications which he held on that date.
(2) In relation to a member of the light vessel service not in the service of Trinity House, paragraph (1) of this Article shall have effect as if any reference in Schedule 4 to this Scheme to a grade included a reference to any capacity which, in the opinion of the Minister, is equivalent to that grade.