Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Sestrel sextant thoughts?
    From: Alexandre Eremenko
    Date: 2020 May 24, 02:19 +0000

    I think I have a simple explanation.
    
    You wrote:
    > For decades, if not centuries, sextant Manufacturers have been publishing 
    Eccentricity "Calibration" corrections in arc seconds while most generally 
    the verniers show [sub-]arcminutes.
    > Why so ? Big mystery to me .
    
    Those manufacturers use the device measuring the arc correction, and this device is graduated in seconds.
    The person who measures the correction just writes what he sees.  Which is natural.
    Once I was present during the procedure (with Freiberger). They sertified my SNO-T sextant,
    and the corrections are written in seconds, though both SNO-T and Freiberger 
    sextant are graduated in minutes.
    
    The device they used looked very old.
    
    Alex.
    
    
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    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