A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Whole Horizon Mirror vs. Split Horizon Mirror
From: Henry Halboth
Date: 2015 Nov 30, 23:52 -0500
In 1946, or therabouts, I purchased the first Whole Hoizon Morror Sextant I had ever seen. I assume it was a Tamaya, made for the Japanese Navy during WWII - I say assumed because everything on the certificate was in Japanese. It was equipped with with a 7 x 50 monocular, micrometer drum reading in whole minutes only, and the legs were fitted to the front side of the instrument to facilitate one handed setting down. Probably due to the 7X magnification, no appreciable difference was noted between sights taken under all conditions, however, I considered the primary advantage of the WHM to be freedom from spray contamination and subsequent salt encrustation of the split mirror type, necessitating frequent cleaning. Regardless, controlling the instrument in high winds and/or rough seas became a problem and I soon changed to using a more conventional sextant. The front mounted legs however were a great advantage Photo attached.
What is NavList?
You can also join by posting. Your first on-topic post automatically makes you a member.
Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.