Facehugger's right, only hover ships can go on land.
Since the navalyard can only be built on water, the ships cannot move on land and used as powerful units..
Thanks for the reminder, _Ti_
May I say that "lazer" is spelt like this : laser...
Laser stands for Light Amplification by Stimulated Emission of Radiation...
I could post a few pictures of the models here but I haven't got a place to upload them, has anyone got any spare webspace?