NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: UNK
Date: 2014 Jan 21, 11:23 -0800
This is just another data point.
Attached is the 1912 calibration sheet from Kew Observatory, preprinted "Class B", and stating 0'0" for all angles listed.
So - 0'0" is not the criteria.
This Weilbach vernier sextant has a minimum reading differential of 15" so maybe one vote for precise measurement capability - not necessarily accuracy.
It's not an octant as the sheet says. The arc goes to 120 degrees but the arm stops a few degrees shy of full scale. It's an almost-sextant.
Regards, Noell
----------------------------------------------------------------
NavList message boards and member settings: www.fer3.com/NavList
Members may optionally receive posts by email.
To cancel email delivery, send a message to NoMail[at]fer3.com
----------------------------------------------------------------
