(19)

(11)

EP 0 571 401 A1

(12)

(43) Date of publication: 01.12.1993 Bulletin 1993/48 (21) Application number: 92902381.0 (22) Date of filing: 23.12.1991

(51) International Patent Classification (IPC):  B63B 1/ 30( . ) B63B 39/ 06( . ) (86) International application number: PCT/GB1991/002310 (87) International publication number: WO 1992/012046 (23.07.1992 Gazette 1992/19)

(84) Designated Contracting States: DE FR IT (30) Priority: 04.01.1991 GB 19910000116 (71) Applicant: VICKERS PLC London SW1P 4RA (GB)	(72) Inventor: McDIARMID, William David Lasswade; Edinburgh EH18 1AD (GB) (74) Representative: Jones, Andrée Zena, et al  CRUIKSHANK & FAIRWEATHER 19 Royal Exchange Square Glasgow, G1 3AE Scotland Glasgow, G1 3AE Scotland (GB)