character: John Harrison
topic: The Development of the Marine Chronometer
grade: 10
subject: Geography
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character: Longitude Prize
topic: The significance of marine timekeeping in navigation
grade: 10
subject: Geography
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character: James Cook
topic: Exploration and the use of chronometers in voyages
grade: 10
subject: Geography
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character: Prime Meridian
topic: The importance of longitude and its impact on geography
grade: 10
subject: Geography
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