CFR /  Title 46  /  Part 69  /  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.