Regulation 7 Net tonnage

The net tonnage (NT) of a ship shall be determined by the following formula—

$$\mathrm{NT}={\mathrm{K}}_2{\mathrm{V}}_{\mathrm{c}}({\genfrac{}{}{0.1ex}{}{\mathrm{4d}}{\mathrm{3D}})}^2+{\mathrm{K}}_3({\mathrm{N}}_1+\genfrac{}{}{0.1ex}{}{{\mathrm{N}}_2}{10})$$

where—

V_c

total volume of cargo spaces in cubic metres;

K₂

0.2 + 0.02 log₁₀ V_c , as specified in Schedule 2.

K₃

$$1.25\genfrac{}{}{0.1ex}{}{\mathrm{GT}+10\text{,}000}{10\text{,}000}$$

GT

gross tonnage calculated in accordance with regulation 6;

D

moulded depth amidships in metres;

d

moulded draught amidships in metres;

N₁

number of berths for passengers in cabins with not more than 8 berths; and

N₂

number of other passengers who may be accommodated on the ship;

provided that—

1. (a)

   the factor—

   $${\left(\genfrac{}{}{0.1ex}{}{\mathrm{4d}}{\mathrm{3D}}\right)}^2$$

   shall not be taken as greater than unity;

2. (b)

   the term—

   $${\mathrm{K}}_2{\mathrm{V}}_{\mathrm{c}}{\left(\genfrac{}{}{0.1ex}{}{\mathrm{4d}}{\mathrm{3D}}\right)}^2$$

   shall not be taken as less than 0.25 GT;

3. (c)

   N₁ and N₂ shall be taken as zero when N₁ + N₂ is less than 13; and

4. (d)

   NT shall not be taken as less than 0.30 GT.