46 C.F.R. § 173.057 Permitted locations for Class I watertight doors.
Title 46 - Shipping
(a) Class I doors are permitted in any location on a sailing school vessel which has a mean length of 125 feet (38.1 meters) or less. (b) Class I doors fitted in accordance with §170.270 of this subchapter shall additionally be marked in two-inch letters “RECLOSE AFTER USE”, and be provided with a remote position indicator at the main navigating station of the vessel. [CGD 83–005, 51 FR 924, Jan. 9, 1986]
Title 46: Shipping
PART 173—SPECIAL RULES PERTAINING TO VESSEL USE
Subpart C—School Ships
§ 173.057 Permitted locations for Class I watertight doors.