7A record shall be entered in the official logbook—
(a)of the time of opening and closing every watertight door operated by power which is fitted between bunkers in the between decks below the bulkhead deck, every such portable plate as is mentioned in paragraph 3 of this Schedule and every such watertight door, and other contrivance as is mentioned in paragraph 1 of this Schedule; and
(b)of every occasion on which the opening and closing of watertight doors and other contrivances is practised on board the ship in pursuance of this Schedule ; and
(c)of every occasion on which watertight doors and other contrivances have been inspected in pursuance of this Schedule.