StacksVerified U.S. regulatory reference

46 CFR §174.195

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck.
  2. (b)Each penetration of, and each opening in, a bulkhead in a machinery space must—
    1. (1)Be kept as high and as far inboard as practicable; and
    2. (2)Except as provided by § 174.210 of this subpart and by paragraph (c) of this section, have means to make it watertight.
  3. (c)No penetration of a bulkhead in a machinery space by a ventilation duct need have means to make the bulkhead watertight if—
    1. (1)Every part of the duct is at least 760 millimeter (30 inches) from the side of the OSV; and
    2. (2)The duct is continuously watertight from the penetration to the main deck.
  4. (d)Each penetration of a bulkhead in a machinery space by piping must meet the design requirements for material and pressure in subchapter F of this chapter.