NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Pillar Sextant
From: Fred Hebard
Date: 2003 Apr 1, 12:38 -0500
From: Fred Hebard
Date: 2003 Apr 1, 12:38 -0500
There is a very nice Troughton circular sextant with pillar on ebay. It was just listed about 1 pm pst yesterday, and has gone from $100 to $1575 with 17 bids by 9:30 am pst today. There are numerous pictures. From what I can tell looking at the vernier, the instrument appears capable of measuring to 20 seconds of arc by direct reading. Interpolation could lower that to 10 or 5 I suppose. The text says 5 seconds. From the text, it appears the author knows what he's talking about, so I suppose 5 seconds is about right. Fred
