## Air Navigation: Based on Principles and Methods Applicable Also to Sea Navigation |

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AbNA acceleration Air Almanac aircraft All-Haversine anticlockwise approx Azimuth c-rod calculated centre Chapter Circle arc clockwise coefficient Comp Compass Course Conversion Angle correct corrector cos2 Devn diagram direction draw DS4S Earth East Easterly Equator error Example force fore-and-aft formula geo-position GHAT given Greenwich Meridian hav h Haversine Haversine formula heavenly body Hence Hour Angle Hughes Inman Intercept Latitude log cosec log sec logarithms Long Longitude March 16 Mercator Chart method Moon navigator needle negative North plane Pole Position Circle Position Line Prime Vertical radians radius Refn Refraction rhumb right angles rotates seamiles sec True Mid sextant Sidereal Sidereal Day sights sin2 Sine Rule star Table Track triangle PZX True Bearing True Course True Horizon Varn velocity vertical West Westerly deviation Zenith Distance