Closure of bulkheads on the ro-ro deckU.K.
29.—(1) All transverse or longitudinal bulkheads which are taken into account as effective to confine the seawater accumulated on the ro-ro deck shall be closed and locked before the ship leaves the berth, and shall remain locked until the ship has been secured at its next berth.
(2) Notwithstanding the requirements of paragraph (1), accesses through such bulkheads may be opened for a period sufficient to allow through passage, on the express authority of the master provided that this is required for the essential working of the ship.