✨ Ship Construction Regulations
3298
THE NEW ZEALAND GAZETTE.
[No. 77
(3) The uniform average permeability throughout the portion of the ship before (or abaft) the machinery space shall be determined from the formula—
63 + 35 a/v, where
a = volume of the passenger spaces, as defined in Regulation I (9), which are situated below the margin line, before (or abaft) the machinery space, and
v = whole volume of the portion of the ship below the margin line before (or abaft) the machinery space.
(4) If a between deck compartment between two watertight transverse bulkheads contains any passenger or crew space, the whole of that compartment, less any space completely enclosed within permanent steel bulkheads and appropriated to other purposes, shall be regarded as passenger space. If, however, the passenger or crew space in question is completely enclosed within permanent steel bulkheads, only the space so enclosed need be considered as passenger space.
REGULATION IV.
Permissible Length of Compartments.
(1) Factor of Subdivision.—The maximum permissible length of a compartment having its centre at any point in the ship’s length is obtained from the floodable length by multiplying the latter by an appropriate factor called the factor of subdivision.
The factor of subdivision shall depend on the length of the ship, and for a given length shall vary according to the nature of the service for which the ship is intended. It shall decrease in a regular and continuous manner—
(a) As the length of the ship increases, and
(b) From a factor A, applicable to ships primarily engaged in the carriage of cargo, to a factor B, applicable to ships primarily engaged in the carriage of passengers.
The variations of the factors A and B shall be expressed by the following formulæ (i) and (ii) where L is the length of the ship as defined in Regulation I (2):—
L in feet.
A = 190 / (L - 198) + 0·18 (L = 430 and upwards).
L in metres.
A = 58·2 / (L - 60) + 0·18 (L = 131 and upwards). ………………(i)
L in feet.
B = 100 / (L - 138) + 0·18 (L = 260 and upwards).
L in metres.
B = 30·3 / (L - 42) + 0·18 (L = 79 and upwards). ………………(ii)
(2) Criterion of Service.—For a ship of given length the appropriate factor of subdivision shall be determined by the Criterion of Service Numeral (hereinafter called the Criterion Numeral) as given by the following formulæ (iii) and (iv) where :—
Cₛ = the Criterion Numeral ;
L = length of the ship, as defined in Regulation I (2) ;
M = the volume of the machinery space, as defined in Regulation 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 machinery 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 ;
P₁ = KN where :—
N = number of passengers for which the ship is to be certified, and
K has the following values :—
Value of K.
Length in feet and volumes in cubic feet.. .. .. 0.6 L.
Length in metres and volumes in cubic metres .. .. 0.056 L.
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VUW Te Waharoa —
NZ Gazette 1934, No 77
NZLII —
NZ Gazette 1934, No 77
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Regulations for Ship Construction
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🚂 Transport & CommunicationsShip construction, Subdivision loadline, Bulkhead deck, Margin line, Floodable length, Permeability, Factor of subdivision, Criterion of service