New American Practical Navigator

Aldebaran anchor angular distance apparent altitude arch azimuth bearing calculation centre chord chronometer circle co-sec co-sine column compass corresponding degrees diameter Diff difference of latitude difference of longitude Dist divided draw elapsed equal equator error EXAMPLE feet Funchal given gives Greenwich half sum horizon glass hour angle hypotenuse instrument latitude and departure line of numbers line of sines logarithm mean meridian altitude method middle latitude miles minutes moon moon's multiplied Nautical Almanac nearly noon object observed altitude obtained parallax parallel passing the meridian perpendicular Plane Sailing points quadrant radius 90 refraction right ascension rule sea account secant semi-diameter sextant ship ship's side star star's subtracted sun's declination Suppose Table XIX Table XXVII taken tangent telescope tion triangle true altitude true distance true longitude tude variation watch wind zenith distance