"Subterranean Fort Assembly technology modifies all of your surface forts so that they use existing surface features to their advantage. They might be built into the side of a huge mountain, underneath a massive miles-wide slab of granite, or otherwise make use of a variety of sturdy planetary features to enhance their ability to withstand damage.
This grants them some additional structural integrity along with making them a lot easier to construct. As a result, once Subterranean Fort Assembly technology has been completed, construction times on all surface forts is halved. Thus, if you were to place a 10 million ton surface fort into a shipyard for assembly, it would be flagged as only having 5 million remaining tons before it was completed. Surface forts already in production when the tech is completed do not benefit from the assembly bonus, but any new surface forts assigned to a shipyard for construction would be. Existing surface forts already in place benefit from the extensive integration with surrounding planetary features for superior integrity purposes.
Repair Yard
Robotic Shipyards
Subterranean Installation Construction
3rd Generation Civil Engineering
This Item cannot be manufactured, and is either a ground combat upgrade or a prerequisite for other technologies
Content contributed by Raven Zachary.