It takes medium hulls, impulse drive, and sensors I or II, I can't remember, to make the standard survey vessel. Mine says it requires Sensors V, which doesn't even exist.
myhf
Population units are confusing. "M" should read "K", or comma should be visually distinct from decimal, or sub-million population should not be displayed. Also the troop / colonist loading dialog should show some unit. The potential starbase range of effect should be shown for constructors. It is not clear in advance whether partially blue parsecs are affected by a starbase. Starbase Mobilization modules are rank "I" and Starbase Projection modules are "III" but there
It's hard to believe that not many people mentioned this before. But I tend to design a new custom race including ships every game. I find it very annoying having to obsolete all the previous designed ships from other custom races. I played one game as normal Drengins and they didn't seem to have the ships I designed