Gemma Frisius proposed a method for finding this quantity which was finally used 250 years later by the"lone genius" in a Dava Sobel history titled for this quantity.
Gemma Frisius proposed a method for finding this quantity which was finally used 250 years later by the"lone genius" in a Dava Sobel history titled for this quantity. Inaccurate measurements of this quantitycaused over 2,000 deaths in the Scilly disaster. The step of "clearing" is used in the lunar distances methodof finding this quantity. By also telling the time from a reference point, the H4 chronometer of JohnHarrison could help obtain this quantity, winning him a 20,000 pound prize for its accurate measurement atsea. For 10 points, name this navigational quantity fretted over by the Greenwich Royal Observatory, atwhich it equals 0.
Gemma Frisius proposed a method for finding this quantity which was finally used 250 years later by the"lone genius" in a Dava Sobel history titled for this quantity.
longitude [prompt on position; prompt on time until "titled" is read]