Celestial navigation Celestial navigation, also known as astronavigation, is the ancient art and science of position fixing that enables a navigator to transition through a space without having to rely on estimated calcul... Celestial navigation - Wikipedia
 Seeing Stars Again: Naval Academy Reinstates Celestial Navigation The same techniques guided ancient Polynesians in the open Pacific and led Sir Ernest Shackleton to remote Antarctica, then oriented astronauts when the Apollo 12 was disabled by lightning, the techni...
 Celestial Navigation Math - YouTube Sep 5, 2012 ... TabletClass.com - http://www.tabletclass.com Math. This video explains the basics of how math is used in celestial navigation. When people ...
 Plough (instrument) The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Plough (instrument) - Wikipedia
 Marine chronometer A marine chronometer is a clock that is precise and accurate enough to be used as a portable time standard; it can therefore be used to determine longitude by means of celestial navigation. When first... Marine chronometer - Wikipedia
 Mariner's astrolabe The mariner's astrolabe, also called sea astrolabe, was an inclinometer used to determine the latitude of a ship at sea by measuring the sun's noon altitude (declination) or the meridian altitude of a... Mariner's astrolabe - Wikipedia
 Astrological aspect In astrology, an aspect is an angle the planets make to each other in the horoscope, and also to the ascendant, midheaven, descendant, lower midheaven, and other points of astrological interest. Aspec...
 Elton's quadrant An Elton's quadrant is a derivative of the Davis quadrant. It adds an index arm and artificial horizon to the instrument. It was invented by John Elton a sea captain who patentedhis design in 1728 a... Elton's quadrant - Wikipedia
 Ephemeris In astronomy and celestial navigation, an ephemeris (plural: ephemerides; from Latin ephemeris, "diary", from Greek ἐφημερίς, ephēmeris, "diary, calendar") gives the positions of naturally occurring... Ephemeris - Wikipedia
 Reflecting instrument Reflecting instruments are those that use mirrors to enhance their ability to make measurements. In particular, the use of mirrors permits one to observe two objects simultaneously while measuring th... Reflecting instrument - Wikipedia
 Hood's cross-staff The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Hood's cross-staff - Wikipedia
 Bris sextant The Bris sextant /ˈbriːs/ is not a sextant proper, but is a small, inexpensive, angle-measuring device that can be used for navigation. The Bris is, however, a true reflecting instrument which derives... Bris sextant - Wikipedia
 Lunar distance (navigation) In celestial navigation, lunar distance is the angle between the Moon and another celestial body. A navigator can use a lunar distance (also called a lunar) and a nautical almanac to calculate Greenwi... Lunar distance (navigation) - Wikipedia
 Demi-cross The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Demi-cross - Wikipedia
 Lunar distance method In celestial navigation, lunar distance is the angle between the Moon and another celestial body. A navigator can use a lunar distance (also called a lunar) and a nautical almanac to calculate Greenwi... Lunar distance method - Wikipedia
 Backstaff The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Backstaff - Wikipedia
 Octant (instrument) The octant, also called reflecting quadrant, is a measuring instrument used primarily in navigation. It is a type of reflecting instrument.The name octant derives from the Latin octans meaning e... Octant (instrument) - Wikipedia
 Intercept method The "Intercept Method", or "Marcq St Hilaire method", as it is also rather inaccurately known, is an astronomical navigation method of calculating an observer's position on earth. It was originally ca... Intercept method - Wikipedia
 Davis quadrant The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Davis quadrant - Wikipedia
 Nautical almanac A nautical almanac is a publication describing the positions of a selection of celestial bodies for the purpose of enabling navigators to use celestial navigation to determine the position of their sh... Nautical almanac - Wikipedia
 History of longitude The history of longitude is a record of the effort, by navigators and scientists over several centuries, to discover a means of determining longitude.The measurement of longitude is important to both ... History of longitude - Wikipedia
 List of selected stars for navigation Fifty-eight selected navigational stars are given a special status in the field of celestial navigation. Of the approximately 6,000 stars visible to the naked eye under optimal conditions, the select... List of selected stars for navigation - Wikipedia
 Navigational Algorithms Navigational Algorithms is a source of information whose purpose is to make available the scientific part of the art of navigation, containing specialized articles and software that implements the var... Navigational Algorithms - Wikipedia
 Geodesy Geodesy (/dʒiːˈɒdɨsi/), — also known as geodetics or geodetics engineering — a branch of applied mathematics and earth sciences, is the scientific discipline that deals with the measurement and repre... Geodesy - Wikipedia
 Almucantar An almucantar (also spelled almucantarat or almacantara) is a circle on the celestial sphere parallel to the horizon. Two stars that lie on the same almucantar have the same altitude. The term was int... Almucantar - Wikipedia
 Cross bow quadrant The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Cross bow quadrant - Wikipedia
 John Harrison John Harrison (3 April  [O.S. 24 March] 1693– 24 March 1776) was a self-educated English carpenter and clockmaker. He invented the marine chronometer, a long-sought after device for... John Harrison - Wikipedia
 Sextant A sextant is a doubly reflecting navigation instrument used to measure the angle between any two visible objects. The principle of the instrument was first implemented around 1730 by John Hadley (168... Sextant - Wikipedia
 Cross-staff The term Jacob's staff, also cross-staff, a ballastella, a fore-staff, or a balestilha, is used to refer to several things. This can lead to considerable confusion unless one clarifies the purpose fo...
 Cole's quadrant The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When observing the sun, users kept the sun to their back (hence th... Cole's quadrant - Wikipedia