Section 25

For the purpose of this Chapter, unless expressly provided otherwise -

"breadth of the ship" is the extreme width from outside of frame to out-side of frame at or below the deepest subdivision load line;

"bulkhead deck" is the uppermost deck up to which the transverse watertight bulkheads are carried;

"deepest subdivision load line" is the water-line which corresponds to the greatest draught permitted by the subdivision requirements which are applicable;

"draught" is the vertical distance from the moulded base line amidships to the subdivision load line in question;

"length of the ship" is the length measured between perpendiculars taken at the extremities of the deepest subdivision load line;

"machinery space" is to be taken as extending from the moulded base line to the margin line and between the extreme main transverse watertight bulkheads, bounding the spaces containing the main and auxiliary propulsion machinery, boilers serving the needs of propulsion, and all permanent coal bunkers; and in the case of unusual arrangements1 the Director may define the limits of the machinery spaces;

"margin line" is a line drawn at least 76 millimetres below the upper surface of the bulkhead deck at side;

"oil tanker" mean~ the oil tanker as defined in Regulation 1 of Annex I of the Protocol of 1978 relating to the International Convention for the

Prevention of Pollution from Ships, 1973;

"passenger spaces" are those spaces which are provided for the accommodation and use of passengers, excluding baggage, store~

provision and mail room~; and for the purposes of regulations 33 and 34, spaces provided below the margin line for the accommodation and use of the crew shall be regarded as passenger spaces;

"permeability" of a space is the percentage of that space which can be occupied by water; the volume of a space which extends above the margin line shall be measured only to the height of that line;

"ro-ro passenger ship" means a passenger ship with ro-ro cargo spaces or special category spaces as defined in regulation 108;

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"subdivision load line" is a water-line used in determining the subdivision of the ship;

"weathertighf' means that in any sea conditions water will not penetrate into the ship.

For the purpose of this Chapter, unless expressly provided otherwise, in all cases, volume and areas shall be calculated to moulded lines.

Interpretation relating to Parts C, D and E.