NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Dark Glass Artificial Horizon
From: Bruce J. Pennino
Date: 2017 Oct 07, 15:14 -0400
From: Bruce J. Pennino
Date: 2017 Oct 07, 15:14 -0400
Rock solid; exactly correct. I tried using a mirror on an elevated wood deck and had to be careful as I moved around. Best to place it on a solid low table or box on terra firma.
Bruce
To:
Cc:
Sent: 07-Oct-2017 16:50:51 +0000
Subject: [NavList] Re: Dark Glass Artificial Horizon
Bruce
-----------------------------------------
From: "Geoffrey Kolbe"To:
Cc:
Sent: 07-Oct-2017 16:50:51 +0000
Subject: [NavList] Re: Dark Glass Artificial Horizon
David Pike wrote:
"I decided to take Amundsen literally and see if it was possible to use the top surface of ‘dark glass’ for a horizon. I bought the darkest piece of welder’s facemask glass I could find for £1GBP. "
Well, that is a lot cheaper than a Freiberger artificial horizon, which is also a 'dark glass' AH. I have found it seems quite adaquate for solar and stellar observations. It is somewhat fiddly to set up though, particularly if what it is sitting on is not literaly 'rock solid'.
Geoffrey Kolbe
