NavList:

Hi Alan. Thanks for that. I guess it is inevitable that the old ways will have to give way. Practical celestial navigation had a relatively short history and when I last took a sight in anger back in 1970 satelites were in their infancy but already showing potential. Satnavs were as big as suitcases! If you get a manual sight to within 2 or 3 miles then you have done very well. We professional navigators would consider that level of accuracy to be quite acceptable considering the quality of the horizon, cloud, moving platform etc. The moon was never a good bet because the sharpness of the limb was rarely any good. I have not done any navigating these last 45 years and have forgotten most of it!. All the best, Neville