Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
    Re: Sighting errors
    From: Brad Morris
    Date: 2019 Jan 7, 18:08 -0500
    Joel

    Do not discount any of the other advice given.  It may not be the leveling process.

    Please post the sensitivity of your Starrett 98.  Peter's point is spot on.

    Another item that occurred to me is where you are placing the AH.  It needs to be on a very stable, secure platform.  It cannot be on a deck or porch, because as you move away for a low angle observation, your mass deflects the deck differently.

    May I also suggest you post your step by step process of sight reduction.  There may be a procedural error in your reduction.  

    Brad



    On Mon, Jan 7, 2019, 5:32 PM Joel Lynn <NoReply_JoelLynn@fer3.com wrote:

    Brad, 

       Thanks for your advice. The cutting board is a 1/2 in. piece of high density polyethlene. The level was placed on the front surface of the mirror, which is 6 in. in diameter. Unfortunately, I have only one Starrett level, but am open to the purchase of a second one. 

    Joel

    View and reply to this message

    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