Artikel 7-1

1. The factor pi for a compartment or group of compartments shall be calculated in accordance with paragraphs 1.1 and 1.2 using the following notations:
j = the aftmost damage zone number involved in the damage starting with No.1 at the stern;
n = the number of adjacent damage zones involved in the damage;
k = is the number of a particular longitudinal bulkhead as barrier for transverse penetration in a damage zone counted from shell towards the centre line. The shell has k = 0;
x1 = the distance from the aft terminal of Ls to the aft end of the zone in question;
x2 = the distance from the aft terminal of Ls to the forward end of the zone in question;
b = the mean transverse distance in metres measured at right angles to the centreline at the deepest subdivision draught between the shell and an assumed vertical plane extended between the longitudinal limits used in calculating the factor pi and which is a tangent to, or common with, all or part of the outermost portion of the longitudinal bulkhead under consideration. This vertical plane shall be so orientated that the mean transverse distance to the shell is a maximum, but not more than twice the least distance between the plane and the shell. If the upper part of a longitudinal bulkhead is below the deepest subdivision draught the vertical plane used for determination of b is assumed to extend upwards to the deepest subdivision waterline. In any case, b is not to be taken greater than B/2.
If the damage involves a single zone only:
If the damage involves two adjacent zones:
If the damage involves three or more adjacent zones:
and where r(x1, x2, b0) = 0
1.1. The factor p(x1, x2) is to be calculated according to the following formulae: Overall normalized max damage length: Jmax = 10/33 Knuckle point in the distribution: Jkn = 5/33 Cumulative probability at Jkn: pk = 11/12 Maximum absolute damage length: lmax = 60 m Length where normalized distribution ends: L* = 260 m Probability density at J = 0: The non-dimensional damage length: The normalized length of a compartment or group of compartments: Jn is to be taken as the lesser of J and Jm 1.1.1. Where neither limits of the compartment or group of compartments under consideration coincides with the aft or forward terminals:
1.1.2. Where the aft limit of the compartment or group of compartments under consideration coincides with the aft terminal or the forward limit of the compartment or group of compartments under consideration coincides with the forward terminal:
1.1.3. Where the compartment or groups of compartments considered extends over the entire subdivision length (Ls):
1.1.1. Where neither limits of the compartment or group of compartments under consideration coincides with the aft or forward terminals:
1.1.2. Where the aft limit of the compartment or group of compartments under consideration coincides with the aft terminal or the forward limit of the compartment or group of compartments under consideration coincides with the forward terminal:
1.1.3. Where the compartment or groups of compartments considered extends over the entire subdivision length (Ls):
1.2. The factor r(x1, x2, b) shall be determined by the following formulae: where: 1.2.1. Where the compartment or groups of compartments considered extends over the entire subdivision length (Ls):
1.2.2. Where neither limits of the compartment or group of compartments under consideration coincides with the aft or forward terminals:
1.2.3. Where the aft limit of the compartment or group of compartments under consideration coincides with the aft terminal or the forward limit of the compartment or group of compartments under consideration coincides with the forward terminal:
1.2.1. Where the compartment or groups of compartments considered extends over the entire subdivision length (Ls):
1.2.2. Where neither limits of the compartment or group of compartments under consideration coincides with the aft or forward terminals:
1.2.3. Where the aft limit of the compartment or group of compartments under consideration coincides with the aft terminal or the forward limit of the compartment or group of compartments under consideration coincides with the forward terminal: