I'm new at this forum, but really pleased to find this site. The length is 10,5 metres and beam something like 3,0 m. It depends on the version you choose, Boomeranger builts practically anything you want. I have driven both diesel and OB version of Boomeranger C-3500 and it's a great RIB. Finnish Lifeboat Society just decided to order two of these to be delivered May 2004. 2x200 HPDI Yamahas fitted...40+ kn speed.
Hull is made of GRP, no wooden parts inside the structure in order to avoid rottening in cold Scandinavian climate. The hull is probably the most scientifically developed RIB hull in the world, Frontier Guard engineers calculated results and made several long live tests with measuring equipment before and after the delivery. Those test took more than a year I'd remember. The boat is therefore very well proven. The maximum structural 100% safe speed is 52 kn, but of course the boat can take much faster speeds if needed.
I don't want to comment any details related to Frontier Guard boats, these are just public pieces of information I have read from public sources.