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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Old style lunar (in expert hands)
From: Fred Hebard
Date: 2004 Dec 10, 22:32 -0500
From: Fred Hebard
Date: 2004 Dec 10, 22:32 -0500
On Dec 10, 2004, at 10:20 PM, Fred Hebard wrote: > On Dec 24, 2004, at 6:49 PM, Kieran Kelly wrote: > >> Its only disadvantage on land is that it is somewhat larger and >> heavier than a sextant. >> >> "Precisely. A theodolite with hardwood tripod legs weighs about 4x >> times as >> much as a sextant. Eg I own a Wild T1a theodolite. The combined weight >> of >> instrument, carrying case and tripod is 12 kgs. The Zeiss Yachtsman >> sextant >> and case which I use on expeditions weighs 2.8kgs. >> > > A Wild T1 might only weigh 12 kilograms, but the ones used in the 1840s > for the Survey of India were more on the order of 120 kilograms. > > Fred I should add that an 1800s sextant with stand was probably around 10 kg.
