(19)

(11)

EP 0 591 347 A1

(12)

(43) Date of publication: 13.04.1994 Bulletin 1994/15 (21) Application number: 92913582.0 (22) Date of filing: 23.06.1992

(51) International Patent Classification (IPC):  B63B 35/ 85( . ) B63H 21/ 22( . ) B63B 35/ 81( . ) G08C 19/ 00( . ) (86) International application number: PCT/AU1992/000307 (87) International publication number: WO 1993/000258 (07.01.1993 Gazette 1993/02)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 24.06.1991 AU 19910006838 (71) Applicant: PALMER, Thomas Michael Seaforth, NSW 2092 (AU)	(72) Inventor: PALMER, Thomas Michael Seaforth, NSW 2092 (AU) (74) Representative: Cummings, Sean Patrick, et al  David Keltie Associates Audrey House Ely Place London EC1N 6SN London EC1N 6SN (GB)