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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: ? ? ? Re: Sextant Scope P arallelism (was Re : SNO-T Sextant)
From: Bruce Stark
Date: 2004 Aug 12, 20:34 EDT
From: Bruce Stark
Date: 2004 Aug 12, 20:34 EDT
Robert,
In measuring altitudes above the sea horizon, you swing the sextant to sure you've brought the sun, or whatever, down to that part of the horizon directly under it. In other words, you are checking that that the measurement is in a vertical plane, not slaunchways. Being vertical doesn't mean it's parallel to the plane of the instrument.
Bruce
In measuring altitudes above the sea horizon, you swing the sextant to sure you've brought the sun, or whatever, down to that part of the horizon directly under it. In other words, you are checking that that the measurement is in a vertical plane, not slaunchways. Being vertical doesn't mean it's parallel to the plane of the instrument.
Bruce
