Artikel 15

(1) All access openings in bulkheads of enclosed superstructures and other outer structures through which water could enter and endanger the vessel, shall be fitted with doors permanently attached to the bulkhead, framed and stiffened so that the whole structure is of equivalent strength to the unpierced structure, and weathertight when closed. The means for securing these doors weathertight shall consist of gaskets and clamping devices or other equivalent means and shall be permanently attached to the bulkhead or to the doors themselves, and shall be so arranged that they can be operated from each side of the bulkhead.
(2) The height above deck of sills in those doorways, in companionways, erections and machinery casings which give direct access to parts of the deck exposed to the weather and sea shall be at least 600 milimetres on the working deck and at least 300 millimetres on the superstructure deck. Where operating experience has shown justification and on approval of the Administration, these heigths, except in the doorways giving direct access to machinery spaces, may be reduced to not less than 380 millimetres and 150 millimetres respectively.