That's awesome that they are building real props to represent ships. I've seen a lot of CGI airplanes and helicopters in Hollywood movies lately, and they are just ordinary, real world aircraft that they wouldn't have even had to build in order to film them for real.
It is the height of laziness when you have a big Hollywood budget and you CGI something (or more likely, just grab a pre-existing CGI model from a hard drive) that exists in the real world.
On relatively low budget TV shows from the '80s they filmed real aircraft (e.g., Airwolf, Magnum, P.I., and many others), yet certain big Hollywood productions today can't be bothered to rent or otherwise acquire an airplane or helicopter and point a camera at it?