xmlns:atom="http://www.w3.org/2005/Atom"
17. Every door required to be watertight shall be of such design, material and construction as will maintain the integrity of the watertight bulkhead in which it is fitted. Any such door shall, together with its frame, be made of cast or mild steel and comply with the specifications set out in section 2 of Schedule 4 in Merchant Shipping Notice MSN 1698 (M).