Dutton's Navigation & Piloting

accuracy accurate Air Almanac altitude angle Article axis azimuth bearing buoys calculator celestial body celestial horizon celestial navigation chart circle Coast compass correction course and speed declination depth determined deviation diagram difference direction distance DMAHC DR position earth equator error example frequency great-circle great-circle distance Greenwich gyro gyrocompass height horizon hour indicated interpolation knots labeled latitude light line of position located longitude Loran-C magnetic marine measured Mercator Mercator chart meridian method minutes minutes of arc moon Nautical Almanac nautical miles navigator Notices to Mariners observations observer's obtained Omega piloting plane plot polar pole radar radio range relative rhumb line rotation running fix scale sextant ship ship's shown in Figure sight signal Solution stars station tabulated tidal tide tion track triangle vector velocity vertical vessel waves