Go back to article: Chronometers, charts, charisma: on histories of longitude

Figure 7

A pen and ink sketch from 1806 of a method for determing longitude using instruments at the bow of a ship

In 1806 Charles Grant, born in Mauritius, soldier in the American Revolution and refugee in Britain after the French Revolution, submitted to the Board of Longitude this ‘Simple method for finding the Longitude at sea’, involving measures of ships’ paths by towing instruments behind the moving vessel.