(19)

(11)

EP 0 088 772 A1

(12)

(43) Date of publication: 21.09.1983 Bulletin 1983/38 (21) Application number: 82902667.0 (22) Date of filing: 09.09.1982

(51) International Patent Classification (IPC):  B63H 25/ 04( . ) G05D 1/ 02( . ) G01C 21/ 00( . ) (86) International application number: PCT/AU1982/000153 (87) International publication number: WO 1983/001048 (31.03.1983 Gazette 1983/08)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 24.09.1981 AU 19810000891 (71) Applicant: MICHAEL, Shawky Shafeek Birmingham Gardens, NSW 2287 (AU)	(72) Inventor: MICHAEL, Shawky Shafeek Birmingham Gardens, NSW 2287 (AU)