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Austral Ship Claims

1. A hull for multi-hull seagoing vessels capable of speeds greater than 30 knots (1.1) 1), wherein: in the case of the sternward half of the hull, located between the stern and midships of the hull, the vertical distance from the hull base line to the volumetric centre-of-gravity of that part of the respective half of the hull below a water line corresponding to a normally occurring hull draft is greater than 55% of the normally occurring draft (1.2);

in the case of the foreward half of the hull, located between the forebody of the hull and midships, said vertical distance is less than 55% of the draft (1.3);

at a position corresponding to 75% of the total length of the underwater body of the hull calculated from the stern of the hull, the distance between the base line and the centre-of-gravity of the frame area (as defined herein) below the water line, and at that position is less than 55% of the draft (1.4); and

the width of the hull at the water line is substantially greater in the after body of the hull than in the foreward body of the hull and continually decreases in a forward direction (1.5),

and wherein the cross-section or shape of the hull throughout a substantial portion of the forward half of the hull located between the bow and midships has a bulbous underwater part and a narrow waisted part which extends through the water line (1.6). …

7. A hull according to any one of claims 1 to 5, wherein the width of the hull at the water line is substantially constant in the case of the sternward quarter part of the vessel and then narrows towards the prow of the vessel.

1) The figures in parenthesis are used to identify the integers of the claim

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