Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Status of Celestial Nav in 2015
    From: Francis Upchurch
    Date: 2015 Mar 8, 23:57 -0700

    re. Lightning strikes.

    That is scary. Does anyone know how  a metal sextant and quartz watch would fare  in that type of strike? Presumably, my plastic back-up Davis 3 and 3 quartz watches in proper Faraday cages (i.e, not just wrapped in foil, but wrapped in neoprene rubber, then metal box) should survive? Were the crew aboard at the time? If not , would they have survived this if they had been? Would a quartz watch, not fried, still give accurate time after a big EMP burst nearbye? My Bygrave slide rule, (no metal) would hopefully survive, but my Fuller and Otis King have metal components???? My Doniol cards should be ok.

    My fundamental question is therefore "is a a sextant, (plastic or metal) and a quartz watch less prone to lightning strike damage than electronics?

    If so, maybe this is the main truly logical reason for cel nav as a back-up?

    Otherwise, I'm happy to just do it because  I enjoy doing it. If the quartz watch is lightning proof, then the chances of loosing GMT are remote and  lunars are just for lunatics who enjoy it like me?



    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site