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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Globes as cel-nav aids on small craft
From: Alexandre Eremenko
Date: 2012 Apr 5, 09:18 -0400
From: Alexandre Eremenko
Date: 2012 Apr 5, 09:18 -0400
Geoffrey, > I have an 18 inch (terrestrial) globe, which is just about large > enough to do sight reductions directly with a large pair of > compasses. By sight reduction, you probably mean a demonstration of the principle of sight reduction:-) The manual to the Soviet globe says: accuracy of the arc division: 1/2 degree... > And... I can take it on a small craft because it is a blow-up globe, > so it can be deflated and packed away when not needed! ;-) :-) You can investigate the influence of your blowing up on the resulting position error... Alex.