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
    Sextant certificates
    From: Jim Hickey
    Date: 2006 Jan 26, 21:59 -0500
    I did post this question at the end of an earlier post but should have posted it separately as it is an earnest request for some feedback.
     
    My Oaklet sextant (very similar to an Astra) that I have owned for about 25 years has a certificate that came with it that indicates an error of +10 seconds in the 20 to 30 degree range. The remainder of the ranges show 0 minutes and 0 seconds of correction.
     
    From the various specs I have seen for top end sextants, it looks like +/-10" is about as good as it gets which makes me think the Oaklet I own is reaching a little. That said, I have only had two other sextants I have worked closely with that also had great looking certificates. Not quite as good as for the Oaklet but < minute correction for only several angle ranges. Not enough to start looking at the certificate if a sight didn't work out well.
     
    Do others have certificates that look like this? When the claim is made that the spec is +/-10", does this suggest that in reality that most of the time the error is considerably less?
     
    I realize making corrections of 10 seconds of arc is getting pretty fine in practical terms but I am curious.
     
     
       
    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