"Dock" is short for "dry dock" so calling it a "space dock" doesn't automatically mean it can't also be a dry dock.
"Dock" is not
short for "drydock."
It IS in certain contexts, as I quoted earlier:
dock 1 |däk|
a structure extending alongshore or out from the shore into a body of water, to which boats may be moored : the gangplank was lowered to the dock.
• an enclosed area of water in a port for the loading, unloading, and repair of ships.
• ( docks) a group of such enclosed areas of water along with the wharves and buildings near them.
• short for dry dock .
• (also loading dock) a platform for loading or unloading trucks or freight trains.