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- Marine_chronometer abstract "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 developed in the 18th century, it was a major technical achievement, as accurate knowledge of the time over a long sea voyage is necessary for navigation, lacking electronic or communications aids. The first true chronometer was the life work of one man, John Harrison, spanning 31 years of persistent experimentation and testing that revolutionized naval (and later aerial) navigation and enabling the Age of Discovery and Colonialism to accelerate.The term chronometer (apparently coined in 1714 by Jeremy Thacker, an early competitor for the prize set by the Longitude Act in the same year) is used more recently to describe wristwatches tested and certified to meet certain precision standards. Timepieces made in Switzerland may display the word 'chronometer' only if certified by the COSC (Official Swiss Chronometer Testing Institute).".
- Marine_chronometer thumbnail MIH-film12_color_cerrected_denoise.jpg?width=300.
- Marine_chronometer wikiPageExternalLink chronometre.html.
- Marine_chronometer wikiPageExternalLink marinechronometer-kaliber-100.
- Marine_chronometer wikiPageExternalLink a_working_chronometer.
- Marine_chronometer wikiPageExternalLink www.nmm.ac.uk.
- Marine_chronometer wikiPageExternalLink nav.005002.
- Marine_chronometer wikiPageID "10553773".
- Marine_chronometer wikiPageRevisionID "601198051".
- Marine_chronometer application "Timekeeping".
- Marine_chronometer caption "Breguet twin barrel box chronometer.".
- Marine_chronometer classification Clock.
- Marine_chronometer hasPhotoCollection Marine_chronometer.
- Marine_chronometer industry Transport.
- Marine_chronometer invented "1737".
- Marine_chronometer inventor "John Harrison".
- Marine_chronometer name "Marine chronometer".
- Marine_chronometer powered "No".
- Marine_chronometer subject Category:Clocks.
- Marine_chronometer subject Category:Horology.
- Marine_chronometer subject Category:Navigational_equipment.
- Marine_chronometer type Artifact100021939.
- Marine_chronometer type Clock103046257.
- Marine_chronometer type Clocks.
- Marine_chronometer type Device103183080.
- Marine_chronometer type Instrument103574816.
- Marine_chronometer type Instrumentality103575240.
- Marine_chronometer type Machine103699975.
- Marine_chronometer type MeasuringInstrument103733925.
- Marine_chronometer type Object100002684.
- Marine_chronometer type PhysicalEntity100001930.
- Marine_chronometer type Timepiece104437953.
- Marine_chronometer type Whole100003553.
- Marine_chronometer comment "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 developed in the 18th century, it was a major technical achievement, as accurate knowledge of the time over a long sea voyage is necessary for navigation, lacking electronic or communications aids.".
- Marine_chronometer label "Chronomètre de marine".
- Marine_chronometer label "Längenuhr".
- Marine_chronometer label "Marine chronometer".
- Marine_chronometer label "Палубные часы".
- Marine_chronometer label "كرونوميتر بحري".
- Marine_chronometer sameAs Längenuhr.
- Marine_chronometer sameAs Chronomètre_de_marine.
- Marine_chronometer sameAs m.02qhngb.
- Marine_chronometer sameAs Q2307829.
- Marine_chronometer sameAs Q2307829.
- Marine_chronometer sameAs Marine_chronometer.
- Marine_chronometer wasDerivedFrom Marine_chronometer?oldid=601198051.
- Marine_chronometer depiction MIH-film12_color_cerrected_denoise.jpg.
- Marine_chronometer isPrimaryTopicOf Marine_chronometer.
