Version 1.12.0, decimal separator is a period, just a few years into a conventional start.
I designed a size-5 two-stage geosurvey missile and launched one at most of the planets in Sol. The first stage is slow (400km/s) but works fine. The second stage fails, giving me this message:
A salvo with 1x Crosswhite Sensor Systems Albatross Geosurvey Bouy has no sensors, no second stage and no method of movement. Therefore it has self-destructed
This was a bit unexpected, so I went hunting for a cause. After some back and forth, I noticed that I still have "No Tech" for geosurvey strength, and that the bouy shows a "-" in the geo column of the tech viewer. The missile designer still shows that I have 1MSP devoted to Geo Sensors, so that's ok.
It appears to me that it shouldn't allow me to design and research a geosurvey missile before I have the geosurvey tech.
SJW: I've changed it so that the geosurvey line doesn't appear until you have geosurvey tech