CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER I-A—MOBILE OFFSHORE DRILLING UNITS (parts 107 to 109) > PART 108—DESIGN AND EQUIPMENT > SUBPART B—Construction and Arrangement (§108.113 to §108.241) > 108.145—Hatches and tonnage openings.

108.145—Hatches and tonnage openings.

Each hatch, except a hatch between storage spaces and each tonnage opening closure, must be made of steel or an equivalent material of the same class as the bulkhead or deck where the opening occurs.