TREATIES
The variations of the factors A and B shall be expressed by the
following formulae (i) and (ii) where L is the length of the ship as
defined in Regulation I (2):-
L in feet.
A
190
18 (L=430 and
L-198
upwards).
100 i (L=260 and
L-138 *
upwards).
Criterion of serv-
ice.
L in metres.
AL-60+
upwards).
30-3
(L=79 and
B L-4 2 + 8 upwards).
(n)
(ii)
(2.) Criterion of Service. -For a ship of given length the appro-
priate factor of subdivision shall be determined by the Criterion of
Service Numeral (hereinafter called the Criterion Numeral) as given
by the following formule (iii) and (iv) where:-
C, = the Criterion Numeral;
L = length of the ship, as defined in Regulation I (2);
M = the volume of the machinery space, as defined in Regu-
lation I (8); with the addition thereto of the volume of
any permanent oil fuel bunkers which may be situated
above the inner bottom and before or abaft the ma-
chinery space;
P = the whole volume of the passenger spaces below the
margin line, as defined in Regulation I (9);
V = the whole volume of the ship below the margin line;
Pt = KN where:-
N = number of passengers for which the
certified, and
K has the following values:-
Length in feet and volumes in
cubic feet . ........
Length in metres and volumes in
cubicmetres.........
ship is to be
Value of K.
.6L
.056 L.
Where the value of KN is greater than the sum of P and the whole
volume of the actual passenger spaces above the margin line the
lower figure may be taken provided that the value of PI used is not
less than % KN.
When Pt is greater than P
p M+2P1
C,=72V++-P
.
...
...
...
.
...
.
Cii)
Pand
in other ases
and in other cases
M+2P
C.=72
V
Rules for subdivis-
ion.
.
.
.
.
.
.
.
(iv)
For ships not having a continuous bulkhead deck the volumes are
to be taken up to the actual margin lines used in determining the
floodable lengths.
(3.) Rules for Subdiision. -(a.) The subdivision abaft thefore peak
of ships 430 feet (131 metres) in length and upwards having a criterion
numeral of 23 or less shall be governed by the factor A given by for-
mula (i); of those having a criterion numeral of 123 or more by the
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