NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Mid XIX century Nav
From: Frank Reed CT
Date: 2005 Nov 22, 01:10 EST
From: Frank Reed CT
Date: 2005 Nov 22, 01:10 EST
Heny H you wrote: "Malham's 1795 Gazetteer lists a "Nangansaqui" in Lat 32-31 N + Long 128-48 E, and further identifies Dutch Factors as resident on a nearby island of Disnia" Ah yes, the famous Japanese DisniaLand...And also: "Nevertheless, as I briefly posted previously, conventional wisdom would require knowledge of Longitude for the rating of chronometers by the usual methods available to seamen. Obviously, there was some early on knowledge of Longitude on the coasts of Japan - probably established by the Dutch traders." Of course if the assumed longitude is somewhat incorrect, you can still get the rate by calculating the error on trials a few days apart. A reliable chronometer rate, even with an originally incorrect value for the chronometer error, would still be useful so long as the error is not too large. -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars
