The Longitude Problem
This film, from Twig World, looks at the relationship between time and place. In an age before satellite navigation and GPS, one man found an ingenious solution to the problem of determining a ship's location at sea. The key points made in the film are: •Lines of latitude circle the Earth horizontally; lines of longitude run vertically from pole to pole. •Calculating your latitude and longitude gives you your position in the world. •Sailors use latitude and longitude to calculate their position at sea. •John Harrison built an accurate portable clock, called a chronometer, to allow accurate naval navigation.
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Downloads
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The longitude problem transcript 50.5 KB
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Longitude and latitude (labelled) 85.81 KB
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Longitude and latitude (unlabelled) 80.07 KB
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Pacific Ocean 115.96 KB
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Satellite image 48.96 KB
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Time zones 32.13 KB
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Tourist map 212.57 KB
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World map 46.98 KB