Oct. 12.] THE NEW ZEALAND GAZETTE. 3299

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 P₁ used is not less than ⅔ KN.

When P₁ is greater than P

C₁ = 72 (M + 2P₁) / (V + P₁ - P) ..................................(iii)

and in other cases

C₁ = 72 (M + 2P) / V ..............................................(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 Subdivision.—(a) The subdivision abaft the fore 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 formula (i); of those having a criterion numeral of 123 or more by the factor B given by formula (ii); and of those having a criterion numeral between 23 and 123 by the factor F obtained by linear interpolation between the factors A and B, using the formula:—

F = A - (A - B)(C₁ - 23) / 100 .....................................(v)

Where the factor F is less than 0.40 and it is shown to the satisfaction of the Administration to be impracticable to comply with the factor F in a machinery compartment of the ship, the subdivision of such compartment may be governed by an increased factor, which, however, shall not exceed 0.40.

(b) The subdivision abaft the fore peak of ships less than 430 feet (131 metres) but not less than 260 feet (79 metres) in length having a criterion numeral equal to S, where

S = (9382 - 20L) / 34 (L in feet) = (3574 - 25L) / 13 (L in metres)

shall be governed by the factor unity; of those having a criterion numeral of 123 or more by the factor B given by the formula (ii); of those having a criterion numeral between S and 123 by the factor F obtained by linear interpolation between unity and the factor B, using the formula:—

F = 1 - (1 - B)(C₁ - S) / (123 - S) ................................(vi)

(c) The subdivision abaft the fore peak of ships less than 430 feet (131 metres) but not less than 260 feet (79 metres) in length and having a criterion numeral less than S, and of all ships less than 260 feet (79 metres) in length shall be governed by the factor unity, unless it is shown to the satisfaction of the Administration to be impracticable to comply with this factor in any part of the ship, in which case, the Administration may allow such relaxation as may appear to be justified, having regard to all the circumstances.

(d) The provisions of sub-paragraph (c) shall apply also to ships of whatever length, which are to be certified to carry a number of passengers exceeding 12 but not exceeding

L² (in feet) / 7000 (L² (in metres) / 650) or 50, whichever is the less.

REGULATION V.

Special Rules concerning Subdivision.

(1) A compartment may exceed the permissible length determined by the rules of Regulation IV provided the combined length of each pair of adjacent compartments to which the compartment in question is common does not exceed either the floodable length or twice the permissible length, whichever is the less.

If one of the two adjacent compartments is situated inside the machinery space, and the second is situated outside the machinery space, and the average permeability of the portion of the ship in which the second is situated differs from that of the machinery space, the combined length of the two compartments shall be adjusted to the mean average permeability of the two portions of the ship in which the compartments are situated.

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