1 The subdivision of a ship is considered sufficient
if the attained subdivision index A, determined in accordance
with regulation 7, is not less than the required subdivision index R calculated in accordance with this regulation and if, in
addition, the partial indices A
s
, A
p
and A
l
are
not less than 0.9R for passenger ships and 0.5R for
cargo ships.
2 For ships to which the damage stability requirements of
this part apply, the degree of subdivision to be provided shall be determined by the
required subdivision index R, as follows:
-
.1 In the case of cargo ships greater than 100
m in length (L
s):
-
.2 In the case of cargo ships not less than 80 m in
length (L) and not greater than 100 m in length (Ls):
where R
o is the value R as
calculated in accordance with the formula in subparagraph .1.
-
.3 In the case of passenger ships:
| Persons on board
|
R
|
| N < 400
|
R = 0.722
|
| 400 ≤ N ≤ 1,350
|
R = N / 7,580 + 0.66923
|
| 1,350 < N ≤ 6,000
|
R = 0.0369 × Ln (N + 89.048) +
0.579
|
| N > 6,000
|
R = 1 - (852.5 + 0.03875 × N) /
(N + 5,000)
|
Where:
N = total number of persons on board.