NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bubble sextants on eBay
From: Alexandre Eremenko
Date: 2006 Dec 31, 21:02 -0500
From: Alexandre Eremenko
Date: 2006 Dec 31, 21:02 -0500
Dear Paul, Thank you very much for the valuable information you gave me. I was not considering a periscopic sextant yet, because I thought they are too heavy (aren't they supposed to be hanging on some hook in the airplane during an observation?) What is the weight of your periscopic sextant? > The only way to be sure about the bubble is to walk > the seller through > the process of forming the bubble. > Ask if the averager works too. That's a big problem of course. As I never held one in my hands, I doubt that I can give to a seller good instruction. I also noticed that many sellers do not want to answer even the simplest questions (like what is the arc radius of an ordinary sextant). And to extort good photos from a typical seller is a big problem too. Many sellers just don't want to be bothered. > Be careful about batteries -- my A-12 sextant > because modern C cells don't fit Somehow I always thought that one can attach a battery somehow, even if it does not fit:-) > radioactive paint (to illuminate the bubble at night) So AN 5951 does not require any battery for observation, correct? Is the bubble usually illuminated by the day light when available? Or there are models where you have to use electricity even in daylight? > The AN5851s have electric illumination for reading the > altitude scales, Reading the scales should not be a problem with a little flashlight. I always use it with marine sextants and find it more convenient (and much brighter) than the built-in illumination. Thanks a lot for your info and Happy NY ! Alex. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---