It's OK, I know how to build boats (and have done so) but a certain amount of experience tells me that construction for the stage often doesn't just mirror construction in real life (I certainly remember the huge roars of laughter when I made a dovetailed drawer for use in a set) and sometimes giving people the impression that they are seeing what they expect to see is more important than showing them what the object would actually look like. Usually the frames are either steam bent (for small boats) or made from series of sawn sections joined with plated scarf joints in order to keep the grain as straight as possible. But in general one doesn't pick boats up very often (at least not without a crane)!