(19)

(11)

EP 1 773 653 A1

(12)

(43) Date of publication: 18.04.2007 Bulletin 2007/16 (21) Application number: 05753868.8 (22) Date of filing: 29.06.2005

(51) International Patent Classification (IPC):  B63H 1/16(2006.01) B63H 1/26(2006.01) (86) International application number: PCT/AU2005/000952 (87) International publication number: WO 2006/002464 (12.01.2006 Gazette 2006/02)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 01.07.2004 AU 2004903625 (71) Applicant: Ringprop Trading Limited Gosport, Hampshire PO12 2AG (GB)	(72) Inventors: MORLEY, Carl, Lance South Melbourne, Victoria 3205 (AU) VELEV, Konstantin, Alexandrov Hampton East, Victoria 3188 (AU) PRICE, Julian, Byron Toorak, Victoria 3142 (AU) (74) Representative: Pawlyn, Anthony Neil  Urquhart-Dykes & Lord LLP Tower North Central Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)