The Problem of Longitude
The measurement of longitude was a problem that came into sharp focus as people began making transoceanic voyages. Determining latitude was relatively easy in that it could be found from the altitude of the sun at noon with the aid of a table giving the sun's declination for the day. For longitude, early ocean navigators had to rely on dead reckoning. This was inaccurate on long voyages out of sight of land and these voyages sometimes ended in tragedy. Finding an adequate solution to determining longitude was of paramount importance.
For details on many of the efforts towards determining the longitude, see History of longitude.
Read more about this topic: Longitude Prize
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