[Code of Federal Regulations] [Title 46, Volume 7] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR170.250] [Page 106] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 170_STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS--Table of Contents Subpart H_Watertight Bulkhead Doors Sec. 170.250 Types and classes. (a) Watertight doors, except doors between cargo spaces, are classed as follows: (1) Class 1--Hinged door. (2) Class 2--Sliding door, operated by hand gear only. (3) Class 3--Sliding door, operated by power and by hand gear. (b) The following types of watertight doors are not permitted: (1) A plate door secured only by bolts; and (2) A door required to be closed by dropping or by the action of dropping weights. (c) Whenever a door of a particular class is prescribed by these regulations, a door of a class bearing a higher number may be used.