aircraft sextant

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• Sextant — This article is about the sextant as used for navigation. For the astronomer s sextant, see Sextant (astronomical). : For the history and development of the sextant see Reflecting instruments A sextant is an instrument generally used to measure… …   Wikipedia

• sextant — sex|tant [ˈsekstənt] n [Date: 1500 1600; : Modern Latin; Origin: sextans sixth part of a circle , from Latin sextus sixth ] a tool for measuring angles between stars in order to calculate the position of a ship or aircraft …   Dictionary of contemporary English

• sextant — noun (C) a tool for measuring angles between stars in order to calculate the position of your ship or aircraft …   Longman dictionary of contemporary English

• oc|tant — «OK tuhnt», noun. 1. one eighth of a circle; a 45 degree angle or arc. 2. one of the eight parts into which a space is divided by three planes intersecting at one point. 3. a) an instrument having an arc of 45 degrees, used in navigation to… …   Useful english dictionary

• Navigation — 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… …   Wikipedia

• Celestial 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… …   Wikipedia

• navigation — 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.… …   Universalium

• Richard E. Byrd — Richard Evelyn Byrd Born 25 October 1888(1888 10 25) Winchester, Virginia …   Wikipedia

• List of United States inventions — 1700s1731 Sextant * The sextant is an astronomical instrument that is used to determine latitude for navigation. It does this by measuring angular distances, like the altitude of the sun, moon and stars. The sextant was invented independently in… …   Wikipedia

• List of inventors — This is a list of inventors. See also: List of scientists, Timeline of invention, List of inventions named after people, List of inventors killed by their own inventions, and . Alphabetical list compactTOC NOTOC A * Vitaly Mikhaylovich Abalakov,… …   Wikipedia

• Richard Evelyn Byrd — Infobox Military Person name= Richard Evelyn Byrd born= Birth date|1888|10|25 died= death date and age|1957|3|11|1888|10|25 placeofbirth= Winchester, Virginia placeofdeath= placeofburial= Arlington National Cemetery caption= nickname= allegiance …   Wikipedia