in which:

Vc = total volume of cargo spaces in cubic meters.

K2 = 0.2 0.02 log10 Vc.

D = molded depth amidships in meters, as “molded depth” is defined in § 69.53.

d = molded draft amidships in meters, as “molded draft” is defined in § 69.53.

N1 = number of passengers in cabins with not more than eight berths, as “passenger” is defined in § 69.53.

N2 = number of other passengers, as “passenger” is defined in § 69.53.

GT = gross tonnage as determined under § 69.57.

N1 plus N2 must equal the total number of passengers the vessel is permitted to carry as indicated on the ship's Passenger Certificate. If N1 plus N2 is less than 13, both N1 and N2 are zero.

NT must not be less than 0.30 GT.