69.107—Gross and net tonnages.
(a)
Gross tonnage is the sum of the following tonnages, less certain spaces exempt under § 69.117 :
(1)
Under-deck tonnage ( § 69.109 ).
(2)
Between-deck tonnage ( § 69.111 ).
(3)
Superstructure tonnage ( § 69.113 ).
(5)
Tonnage of framed-in propelling machinery spaces included in calculating gross tonnage ( § 69.121(d)(1) ).
(b)
Net tonnage is gross tonnage less deductions under §§ 69.119 and 69.121.