We had quite a good astro navigation system in a V bomber I used to fly a while back. I't's performance depended on how much beer it had drunk the night before and whether it had new AAs in it's calculator !
The Apollo capsules used an astro-inertial system. The inertial gyros were run down while it was on a steady tradjectory and the astro tracking took over. the gyros were run up before any manouevreing.