(19)

(11)

EP 2 788 977 A2

(12)

(88) Date of publication A3: 05.12.2013 (43) Date of publication: 15.10.2014 Bulletin 2014/42 (21) Application number: 12812683.6 (22) Date of filing: 04.12.2012

(51) International Patent Classification (IPC):  G10K 11/20(2006.01) (86) International application number: PCT/GB2012/053005 (87) International publication number: WO 2013/083969 (13.06.2013 Gazette 2013/24)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 08.12.2011 GB 201121116 (71) Applicant: Subsea Asset Location Technologies Limited Portland DT5 1BX (GB)	(72) Inventor: TILTMAN, Carl Peter Weymouth DT4 0EA (GB) (74) Representative: Beckham, Robert William  Beckhams IP Gatehouse Lake Road Portishead Bristol BS20 7JA Bristol BS20 7JA (GB)