An Elton's quadrant is a derivative of the Davis quadrant. It adds an index arm and artificial horizon to the instrument. It was invented by John Elton a sea captain who patented his design in 1728 and published details of the instrument in the Philosophical Transactions of the Royal Society in 1732.
Read more about Elton's Quadrant: Construction, Significance To Navigation
Famous quotes containing the word elton:
“No collection of people who are all waiting for the same thing are capable of holding a natural conversation. Even if the thing they are waiting for is only a taxi.”
—Ben Elton (b. 1959)