meridian altitude method
1Meridian altitude — is an astronomical navigation method of calculating an observer s latitude. Contents 1 Principle 2 Methodology 3 See also 4 References …
2Meridian circle — Groombridge transit circle of 1806 The meridian circle, transit circle, or transit telescope is an instrument for observing the time of stars passing the meridian, at the same time measuring its angular distance from the zenith. The idea of… …
3Ex-meridian — is an astronomical navigation method of calculating an observer’s position on earth. The method gives the observer a position line on which the observer is situated. It is usually used when the sun is obscured at noon and as a result a meridian… …
4Intercept 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 called the azimuth intercept method because the… …
5Celestial navigation — Celestial navigation, also known as astronavigation, is a position fixing technique that was devised to help sailors cross the featureless oceans without having to rely on dead reckoning to enable them to strike land. Celestial navigation uses… …
6Longitude by chronometer — Longitude by Chronometer, known by mariners as Long by Chron , is an astronomical navigation method of calculating an observer s position on earth. The method gives the observer a position line on which the observer is situated. Usually the… …
7Mariner's astrolabe — Three Mariner s Astrolabes in the Museum of the Forte da Ponta da Bandeira; Lagos, Portugal This article is about the Mariner s astrolabe. For the Planispheric astrolabe, see Astrolabe. The mariner s astrolabe, also called sea astrolabe, was an… …
8Geography in medieval Islam — Islamic geography includes the advancement of geography, cartography and earth sciences under various Islamic civilizations. During the medieval ages, Islamic geography was driven by a number of factors: the Islamic Golden Age, parallel… …
9navigation — navigational, adj. /nav i gay sheuhn/, n. 1. the act or process of navigating. 2. the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. [1520 30; < L navigation (s. of navigatio) a voyage.… …
10Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …
