Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Sextant> ?p ?o }
- Sextant abstract "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implemented around 1730 by John Hadley (1682–1744) and Thomas Godfrey (1704–1749) but it was also found later in the unpublished writings of Isaac Newton (1643–1727). The history of these and related instruments, and their forerunners, may be found in the article on reflecting instruments.The primary use of a sextant is to determine the angle between an astronomical object and the horizon for the purposes of celestial navigation. The determination of this angle, the altitude, is known as sighting (or shooting) the object, or taking a sight. The angle, and the time when it was measured, can be used to calculate a position line on a nautical or aeronautical chart. Common uses of the sextant include sighting the sun at solar noon or Polaris at night (in the Northern Hemisphere) to determine latitude. Sighting the height of a landmark can give a measure of distance off and, held horizontally, a sextant can measure angles between objects for a position on a chart. A sextant can also be used to measure the lunar distance between the moon and another celestial object (such as a star or planet) in order to determine Greenwich Mean Time and hence longitude.".
- Sextant thumbnail Sextant.jpg?width=300.
- Sextant wikiPageExternalLink AFPAM11-216.pdf.
- Sextant wikiPageExternalLink bowditch.
- Sextant wikiPageExternalLink 1u.
- Sextant wikiPageExternalLink 1up.
- Sextant wikiPageExternalLink history.
- Sextant wikiPageExternalLink Chapter_17.
- Sextant wikiPageExternalLink www.celnav.de.
- Sextant wikiPageExternalLink lunars.
- Sextant wikiPageExternalLink www.hmnao.com.
- Sextant wikiPageExternalLink CDSextantProject.htm.
- Sextant wikiPageID "29588".
- Sextant wikiPageLength "21737".
- Sextant wikiPageOutDegree "93".
- Sextant wikiPageRevisionID "682736207".
- Sextant wikiPageWikiLink Aircraft.
- Sextant wikiPageWikiLink Alidade.
- Sextant wikiPageWikiLink Angle.
- Sextant wikiPageWikiLink Angular_accuracy.
- Sextant wikiPageWikiLink Artificial_horizon.
- Sextant wikiPageWikiLink Astronomical_object.
- Sextant wikiPageWikiLink Attitude_indicator.
- Sextant wikiPageWikiLink Backstaff.
- Sextant wikiPageWikiLink Bris_sextant.
- Sextant wikiPageWikiLink Category:1731_introductions.
- Sextant wikiPageWikiLink Category:Astronomical_instruments.
- Sextant wikiPageWikiLink Category:Celestial_navigation.
- Sextant wikiPageWikiLink Category:Navigational_equipment.
- Sextant wikiPageWikiLink Celestial_navigation.
- Sextant wikiPageWikiLink Church_(building).
- Sextant wikiPageWikiLink Collimated_light.
- Sextant wikiPageWikiLink Collimation.
- Sextant wikiPageWikiLink Cosine_error.
- Sextant wikiPageWikiLink Davis_quadrant.
- Sextant wikiPageWikiLink Dawn.
- Sextant wikiPageWikiLink Degree_(angle).
- Sextant wikiPageWikiLink Dusk.
- Sextant wikiPageWikiLink File:Using_sextant_swing.gif.
- Sextant wikiPageWikiLink Filter_(optics).
- Sextant wikiPageWikiLink Fix_(position).
- Sextant wikiPageWikiLink Fuselage.
- Sextant wikiPageWikiLink Gago_Coutinho.
- Sextant wikiPageWikiLink Glare_(vision).
- Sextant wikiPageWikiLink Greenwich_Mean_Time.
- Sextant wikiPageWikiLink Harold_Gatty.
- Sextant wikiPageWikiLink History_of_longitude.
- Sextant wikiPageWikiLink Horizon.
- Sextant wikiPageWikiLink Horizontal_coordinate_system.
- Sextant wikiPageWikiLink Intercept_method.
- Sextant wikiPageWikiLink Invar.
- Sextant wikiPageWikiLink Isaac_Newton.
- Sextant wikiPageWikiLink John_Hadley.
- Sextant wikiPageWikiLink Landmark.
- Sextant wikiPageWikiLink Latin.
- Sextant wikiPageWikiLink Latitude.
- Sextant wikiPageWikiLink Lighthouse.
- Sextant wikiPageWikiLink Limb_darkening.
- Sextant wikiPageWikiLink Longitude.
- Sextant wikiPageWikiLink Longitude_by_chronometer.
- Sextant wikiPageWikiLink Lunar_distance_(astronomy).
- Sextant wikiPageWikiLink Lunar_distance_(navigation).
- Sextant wikiPageWikiLink Lunar_phase.
- Sextant wikiPageWikiLink Mariners_astrolabe.
- Sextant wikiPageWikiLink Minute_and_second_of_arc.
- Sextant wikiPageWikiLink Minute_of_arc.
- Sextant wikiPageWikiLink Mist.
- Sextant wikiPageWikiLink Monocular.
- Sextant wikiPageWikiLink Moon.
- Sextant wikiPageWikiLink Nathaniel_Bowditch.
- Sextant wikiPageWikiLink National_Geospatial-Intelligence_Agency.
- Sextant wikiPageWikiLink National_Imagery_and_Mapping_Agency.
- Sextant wikiPageWikiLink Nautical_chart.
- Sextant wikiPageWikiLink Nautical_mile.
- Sextant wikiPageWikiLink Nautical_twilight.
- Sextant wikiPageWikiLink Navigation.
- Sextant wikiPageWikiLink Noon.
- Sextant wikiPageWikiLink Octant_(instrument).
- Sextant wikiPageWikiLink Optical_filter.
- Sextant wikiPageWikiLink Parallel_(geometry).
- Sextant wikiPageWikiLink Periscope.
- Sextant wikiPageWikiLink Plane_(geometry).
- Sextant wikiPageWikiLink Plane_(mathematics).
- Sextant wikiPageWikiLink Planet.
- Sextant wikiPageWikiLink Point_source.
- Sextant wikiPageWikiLink Polaris.
- Sextant wikiPageWikiLink Position_line.
- Sextant wikiPageWikiLink Reflecting_instrument.
- Sextant wikiPageWikiLink Rotation_around_a_fixed_axis.
- Sextant wikiPageWikiLink Sea_level.
- Sextant wikiPageWikiLink Sextant_(astronomical).
- Sextant wikiPageWikiLink Sight_reduction.
- Sextant wikiPageWikiLink Silvering.
- Sextant wikiPageWikiLink Solar_noon.
- Sextant wikiPageWikiLink Star.
- Sextant wikiPageWikiLink Sun.
- Sextant wikiPageWikiLink Telescope.
- Sextant wikiPageWikiLink The_Stationery_Office.
- Sextant wikiPageWikiLink Thomas_Godfrey_(inventor).
- Sextant wikiPageWikiLink Twilight.