Air Navigation

accuracy accurate air speed aircraft airplane airport airway aviator azimuth beacon bearing celestial avigation celestial sphere chart circle clouds compass course corr course and distance dead reckoning dead-reckoning position declination determined deviation diagram direction drift earth east equator error flying give given Greenwich civil Greenwich hour angle Greenwich sidereal ground speed heading heavenly body horizon indicator instrument isobars knots latitude light Line of Position local hour angle log sec longitude magnetic course marked Mercator Mercator chart meridian method moon Nautical Almanac nautical miles observed pilot plane plotting pole Position Book practical radio reading right ascension scale sextant shown in Fig signals solution Star Altitude Curves station steer tables tion track course Track Track Track triangle true course variation velocity vernal equinox vertical watch weather wind angle wind correction Wind Wind Wind