When trying to construct a shipyard, or trying to use a shipyard for a particular ship, if the ship is too big or if for some reason the core block is somewhere that making the ship dock there is not possible, at the moment you only get a message to that effect.
I would suggest that when you load a design, you still somehow get to see a ghost representation of the ship where the shipyard core would make it dock, even if it's too big etc, so that you then have an idea of what modifications need to be made to the shipyard to accommodate the ship. The ghost could be shaded red to indicate it doesn't have a valid placement.
Ideally the ghost representation would persist so that it was visible while you were making changes to the shipyard, and possibly it could change color/shading to indicate when it has a valid placement.
I would suggest that when you load a design, you still somehow get to see a ghost representation of the ship where the shipyard core would make it dock, even if it's too big etc, so that you then have an idea of what modifications need to be made to the shipyard to accommodate the ship. The ghost could be shaded red to indicate it doesn't have a valid placement.
Ideally the ghost representation would persist so that it was visible while you were making changes to the shipyard, and possibly it could change color/shading to indicate when it has a valid placement.