[Code of Federal Regulations] [Title 46, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR69.161] [Page 414] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 69_MEASUREMENT OF VESSELS--Table of Contents Subpart D_Dual Measurement System Sec. 69.161 Gross and net tonnages. (a) Gross tonnage means the tonnage of a vessel, less certain spaces exempt under Sec. 69.169, and is the sum of the following: (1) Under-deck tonnage (Sec. 69.163). (2) Between-deck tonnage (Sec. 69.165) (3) Superstructure tonnage (Sec. 69.167) (4) Excess hatchway tonnage (Sec. 69.115) (5) Tonnage of framed-in propelling machinery spaces included in calculating gross tonnage (Sec. 69.121(d)(1)). (b) Net tonnage means gross tonnage less deductions under Sec. 69.119 and Sec. 69.121.