NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Don Seltzer
Date: 2013 Feb 7, 12:43 -0800
Frank wrote: Yes, but not "practicable" ...
And the terms of the Longitude Prize also stipulated 'useful at sea'. That was the failing of the Jovian Moon method - in principle it was accurate enough and occurred frequently enough to be useful for points on shore, but it was not possible to keep a telescope pointed continuously at Jupiter for an accurate timing while aboard a ship at sea.
Even despite the best efforts of Dr Maskelyne and Capt Aubrey, RN to invent a gimballed chair for counteracting a ship's motions.
Don Seltzer
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