Post
Region: New World Union
(Covertly.)
Mount Cargill - New Zealand.
The Culture vessels start to build a large antenna like device. Which turns out to be a holographic/cloaking field emitter.
Which prevents observations from overhead and surrounding sensor sweeps.
The Culture then starts to tunnel into the rocks of New Zealand and started to build a giant underground base using advanced technologies to make the base secure and viable.
(Not covertly)
The Alaskan flies down to near Earth orbit and Launches the components for a sea base off the Tasmanian Coast.
The Unovians can see the various modules fly through the skies like giant fire-balls before they crash into the sea. The Culture vessels then retrieve the modules and put them together rapidly forming the base. Which soon spreads over the southern ocean for some miles.