NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Rommel John Miller
Date: 2015 Oct 1, 23:09 -0400
https://www.google.com/patents/US2981143?dq=blish+sextant
Note the search phrase for Google patents above, Blish and sextant
is the link. But search blish sextant
I was really hoping that the wonderful sextant umbrella as Frank Reed posited would be there, but it wasn’t.
Still an interesting take on the idea of prisms and a sextant.
Funny do a patents (google) on Blish and Navigation and see what pops up!
This link will get you there:
this link is for a Scanning Sextant not unlike the aviation sextants I have seen:
And this link gets you a neat sounding tube for navigation: The Zera I
This site however is just cool:
http://www.theglobaltutors.com/Physics-Homework-Help/Optics-Homework-Help/Sextant
The physics behind the lovely nautical sextant.
Rommel John Miller
8679 Island Pointe Drive
Hebron, MD 21830-1093
410-219-2690 (Land and Home)
443-365-7925 (Cell)
From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Bill Morris
Sent: Thursday, October 1, 2015 10:22 PM
To: rommeljohnmiller@gmail.com
Subject: [NavList] Re: Sextant with an umbrella
I agree with Luc. It's a Blish prism. More details and a patent drawing can be found here: http://sextantbook.com/2012/04/
Bill Morris
Pukenui
New Zealand
