I accidentally gave my Missile Bases task group order to survey nearest planer or moon, what was my surprise when I saw Missile Base on the orbit of Luna trying to actually survey it, I checked if I didn't gave my geosurvey task group this weird name, but no - the whole nuclear arsenal of the 20th century humanity is now on the orbit of Luna. It is the second time I see something without drive to fly, first time it was civilian freighter, now it is whole PDC, are those things even meant to do that? Maybe I will skip adding engines to my designs? They do quite good without them.
BTW how do I get those things back to Earth? They provide free protection level and I'm not sure I could explain why people should feel safe when huge chunks of concrete and steel with NO ENGINES are flying right over their heads.