46 C.F.R. § 174.335 Watertight doors.
Title 46 - Shipping
(a) Each hopper dredge must have sliding watertight doors (Class 3) approved under §170.270 of this chapter if the sill for the door is— (1) Installed below the bulkhead deck; and (2) Less than 24 inches above the final waterline as shown by the calculations required by §174.310 in each damage condition up to and including the maximum amount of assumed damage. (b) Each hopper dredge must have sliding watertight doors (Class 3) approved under §170.270 of this chapter, or quick acting hinged watertight doors (Class 1) approved under the same subpart if the sill of the watertight door is— (1) Installed below the bulkhead deck; and (2) Greater than 24 inches above the final waterline as shown by the calculations required by §174.310 in each damage condition up to and including the maximum amount of assumed damage. [CGD 76–080, 54 FR 36977, Sept. 6, 1989, as amended by CGD 95–072, 60 FR 50468, Sept. 29, 1995]
Title 46: Shipping
PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES
Subpart I—Hopper Dredges With Working Freeboard Assignments
Design
§ 174.335 Watertight doors.
