You might have more luck with a response if your query was a little more specific, for example, Nauticat's range varies greatly in style, size and ability and few people will have had experience of all of them. My own experience is limited to a collision with a small one, lots of flying splinters of varnished hardwood.
I think the Sea Finn was a very rare bird in UK waters - I've never knowingly spotted one - whereas Nauticats are relatively common. Good luck with your enquiry, but don't hold your breath,