Great pictures! That looks like one of their surfboats or MLBs (marine life boats I think). It must be a thrill to drive one of those from the flybridge in those conditions. I found some impressive videos of them in action on a Coast Guard page. I'd post the link but I'm too newb. Good times.
The photos show what looks to be a "home-made" Canadian CG MLB. They were built in Canada by Metalcraft under license from the USCG, replicating the 47' MLBs built by Textron that we use down here in the States.
Great pictures! That is truly remarkable you should enter those in a contest or submit them. Theres this book called The Sea thats a collection of maritime photographs, most of which are powerful scenes of the Sea's might. Such as lighthouses off the coast of France and Spain getting completely battered, etc. Great work!