NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: CelNav without sextants
From: Bruce Stark
Date: 2004 Nov 2, 23:42 EST
From: Bruce Stark
Date: 2004 Nov 2, 23:42 EST
Alex,
Raper's "Practice of Navigation" has three pages on Finding the Longitude by Occultation. Here are two passages, one near the beginning, the other at the end:
"This observation affords, in favorable cases, the most decisive results, because it is both instantaneous and altogether independent of instrumental adjustments."
"The case least liable to error on the several accounts enumerated are those which occur when the moon is near the meridian, and in which the central zone of the moon passes over the star. The emersion from the dark limb is the case most distinctly marked."
If you like, I'll send you photocopies of the three pages. But you'll have to send your US mail address soon, as Janice and I are leaving again shortly, and will be gone for several weeks.
Bruce
Raper's "Practice of Navigation" has three pages on Finding the Longitude by Occultation. Here are two passages, one near the beginning, the other at the end:
"This observation affords, in favorable cases, the most decisive results, because it is both instantaneous and altogether independent of instrumental adjustments."
"The case least liable to error on the several accounts enumerated are those which occur when the moon is near the meridian, and in which the central zone of the moon passes over the star. The emersion from the dark limb is the case most distinctly marked."
If you like, I'll send you photocopies of the three pages. But you'll have to send your US mail address soon, as Janice and I are leaving again shortly, and will be gone for several weeks.
Bruce
