Available calculators: Celestial Navigation: - Altitude Correction for Air Temperature - Altitude Correction for Atmospheric Pressure - Altitude Factors & Change of Altitude - Compass Error from Amplitudes Observed on the Celestial Horizon - Compass Error from Amplitudes Observed on the Visible Horizon - Latitude and Longitude Factors - Meridian Angle and Altitude of a Body on the Prime Vertical Circle - Pub 229 - Table of Offsets Conversions: - Chart Scales and Conversion for Nautical and Sta