Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Backstaff> ?p ?o. }
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- Backstaff abstract "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 the name) and observed the shadow cast by the upper vane on a horizon vane.It was invented by the English navigator John Davis who described it in his book Seaman's Secrets in 1594.".
- Backstaff thumbnail Davis_quadrant_4.jpg?width=300.
- Backstaff wikiPageExternalLink HistSciTech-idx?type=turn&entity=HistSciTech000900240225&isize=L.
- Backstaff wikiPageExternalLink backstaff?cat=technology.
- Backstaff wikiPageID "974163".
- Backstaff wikiPageRevisionID "606016982".
- Backstaff hasPhotoCollection Backstaff.
- Backstaff subject Category:Astronomical_instruments.
- Backstaff subject Category:Celestial_navigation.
- Backstaff subject Category:Historical_scientific_instruments.
- Backstaff subject Category:Measuring_instruments.
- Backstaff subject Category:Navigational_equipment.
- Backstaff type Artifact100021939.
- Backstaff type AstronomicalInstruments.
- Backstaff type Device103183080.
- Backstaff type HistoricalScientificInstruments.
- Backstaff type Instrument103574816.
- Backstaff type Instrumentality103575240.
- Backstaff type MeasuringInstrument103733925.
- Backstaff type MeasuringInstruments.
- Backstaff type Object100002684.
- Backstaff type PhysicalEntity100001930.
- Backstaff type ScientificInstrument104147495.
- Backstaff type Whole100003553.
- Backstaff comment "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 the name) and observed the shadow cast by the upper vane on a horizon vane.It was invented by the English navigator John Davis who described it in his book Seaman's Secrets in 1594.".
- Backstaff label "Backstaff".
- Backstaff label "Cuadrante de Davis".
- Backstaff label "Quadrante de Davis".
- Backstaff sameAs Cuadrante_de_Davis.
- Backstaff sameAs Quadrante_de_Davis.
- Backstaff sameAs m.03vs2s.
- Backstaff sameAs Q3298443.
- Backstaff sameAs Q3298443.
- Backstaff sameAs Backstaff.
- Backstaff wasDerivedFrom Backstaff?oldid=606016982.
- Backstaff depiction Davis_quadrant_4.jpg.
- Backstaff isPrimaryTopicOf Backstaff.
