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: Instumental error?
    From: Frank Reed
    Date: 2005 Apr 19, 21:38 EDT
    Alex you wrote:
    "25      38    51    65    68    71     82    90    127
    -0.5   -0.4  -0.4  -0.6  -0.2  -0.1   -0.2  -0.2  -0.8

    Should I attach this table to my sextant box lid as a
    certificate, and use it?"
     
    I would. How do you feel about the large jumps in the table from 65 to 68 and, less so, from 90 to 127?
     
    Incidentally, you wrote:
    "But even the seller
    confirmed that in the last years of Soviet Union, no one
    really cared to measure and they filled the certificates with
    random numbers (even did not care to vary these numbers:-)"
     
    I think this is likely to be the case with a lot of modern sextants for all the usual reasons: declining use of celestial, inherent limitations to most celestial at the one arc minute level, etc.
     
    I see no particular problem with using an eccentricity table or arc error table if it's been validated carefully. I think this is probably the best practical reason for shooting lunars (which seem to be somewhat superior to star-star sights when they're done right).
     
    -FER
    http://www.HistoricalAtlas.com/lunars
       
    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