Discovery mod is a full-scale expansion pack for Freelancer focused on continuing the story started in the vanilla campaign. The mod is used by some of the busiest multiplayer Freelancer servers and has multiplayer features including player owned (and built) bases, jumpdrives, cloaking devices and equipment manufacturing.
This is the test station the Discovery member Daedric set up for his tutorial on base building. It's a core 1 PoB, which is the basic deployment structure. To deploy a base, you need a Base Construction Platform (the ship pictured - previously the Heavy Lifter) which is filled with the appropriate commodities. Screen taken by Discovery member Daedric.