Hi, can any ex sbs men help me trace the history of my boat. It is very simular in looks to a U.S alluminium twin engine and twin jetdrive bridge erection boat but mine has a GRP hull which was made at Tyler boats in Kent, engines are Ford turbo diesel driving twin Dowty 500 mk1 jet drive units with 4 alluminium rudders beyond, at a guess i would say my boat is circa early eighties and not sure if only ever used as prototype?any information would be very much appriciated.