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of the conditions of stability on which the calculations of heel are based and be warned that excessive heeling might result should the ship sustain damage when in a less favourable condition. (h) (i) No relaxation from the requirements for damage stability may be considered by an Administration unless it is shown that the intact metacentric height in any service condition necessary to meet these requirements is excessive for the service intended. (ii) Relaxations from the requirements for damage stability shall be permitted only in exceptional cases and subject to the condition that the Administration is to be satisfied that the proportions, arrangements and other characteristics of the ship are the most favourable to stability after damage which can practically and reasonably Be adopted in the particular circumstances. Regulation 8 Peak and Machinery Space Bulkheads, Shaft Tunnels, &c. (a) (i) A ship shall have a forepeak or collision bulkhead, which shall be watertight up to the bulkhead deck. This bulkhead shall be fitted not less than-5 per cent, of the length of the ship, and not more than 10 feet (or 3-05 metres) plus 5 per cent, of the length of the ship from the forward perpendicular. (ii) If the ship has a long forward superstructure, the forepeak bulkhead shall be extended weathertight to the deck next above the bulkhead deck. The extension need not be fitted directly over the bulkhead below, provided it is at least 5 per cent, of the length of the ship from the forward perpendicular, and the part of the bulkhead deck which forms the step is made effectively weathertight. (b) An afterpeak bulkhead, and bulkheads dividing the machinery space, as defined in Regulation 2, from the cargo and passenger spaces forward and aft, shall also be fitted and made watertight up to the bulkhead deck, The afterpeak bulkhead may, however, be stopped below the bulkhead deck, provided the degree of safety of the ship as regards subdivision is not thereby diminished. (c) In all cases stern tubes shall be enclosed in watertight spaces of moderate volume. The stern gland shall be situated in a watertight shaft tunnel or other watertight space separate from the stern tube compartment and of such volume that, if flooded by leakage through the stern gland, the margin line will not be submerged. Regulation 9 Double Bottoms (a) A double bottom should be fitted extending from the forepeak bulkhead to the afterpeak bulkhead as far as this is practicable and compatible with the design and proper working of the ship. (i) In ships 200 feet (or 61 metres) and under 249 feet (or 76 metres) in length a double bottom shall be fitted at least from the machinery space to the forepeak bulkhead, or as near thereto as practicable. (ii) In ships 249 feet (or 76 metres) and under 330 feet (or 100 metres) in length a double bottom shall be fitted at least outside the machinery space, and shall extend to the fore and after peak bulkheads, or as near thereto as practicable.

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