Here are some examples of the star charts that I made. They are screen shots from the flak station with the navigation stars labeled. I took them every 120° of bearing with one shot tilted down and the other tilted up. I didn't check my work here, so there could be an error. Comparison with bearing information in the almanac data will reveal any error.
There are 12 pictures in all showing all 23 navigation stars visible at the time and also Polaris.
