(1) The net tonnage (NT) of a ship shall be determined
by the following formula:
in which formula:
-
(a) the factor 
shall not be taken as greater than unity;
-
(b) the term 
shall not be taken as less than 0.25 GT; and
-
(c) NT shall not be taken as less than 0.30 GT,
and in which:
|
Vc
|
= |
total
volume of cargo spaces in cubic metres, |
|
K2
|
= |
0.2
+ 0.02 log10
V
c (or as tabulated
in Appendix 2),
|
|
K3
|
= |
1.25 
|
|
d |
= |
moulded draught
amidships in metres as defined in paragraph (2) of this Regulation, |
|
N1
|
= |
number
of passengers in cabins with not more than 8 berths, |
|
N2
|
= |
number
of other passengers, |
|
N1 + N2
|
= |
total number of passengers the ship is permitted to carry as
indicated in the ship's passenger certificate; when N1 +
N2 is less than 13, N1, and N2 shall
be taken as zero,
|
|
GT
|
= |
gross
tonnage of the ship as determined in accordance with the provisions
of Regulation 3.
|
(2) The moulded draught (d) referred to in paragraph
(1) of this Regulation shall be one of the following draughts:
-
(a) for ships to which the International Convention
on Load Lines in force applies, the draught corresponding to the Summer
Load Line (other than timber load lines) assigned in accordance with
that Convention;
-
(b) for passenger ships, the draught corresponding
to the deepest sub-division load line assigned in accordance with
the International Convention for the Safety of Life at Sea in force
or other international agreement where applicable;
-
(c) for ships to which the International Convention
on Load Lines does not apply but which have been assigned a load line
in compliance with national requirements, the draught corresponding
to the summer load line so assigned;
-
(d) for ships to which no load line has been assigned
but the draught of which is restricted in compliance with national
requirements, the maximum permitted draught;
-
(e) for other ships, 75 per cent of the moulded
depth amidships as defined in Regulation 2 (2).