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In october,1707 four British warships ran aground because of error in position,sparking the effort to produce a marine clock that would be accurate to locate a position with in 30 miles after sailing from England to the West Indies & back again (a)What daily accuracy for such a clock would be required? (b)What dalilt accuracy in aclock is required to fix position to with in 0.5 miles after 1 year at sea?

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closed as too localized by Manishearth May 22 '13 at 19:58

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