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: Sextant accuracy with short distance to horizon
    From: UNK
    Date: 2001 Jun 21, 8:05 AM

    Dan Allen [mailto:danallen{at}NWLINK.COM] asked:
    
    
    Simply put, is there a formula or correction to give greater accuracy to
    sextant shots taken using a very close horizon?  If one knows the exact
    distance to the local horizon, can this be applied to the shot to give a
    more accurate reading of the angle of a celestial body?
    
    
    
    
    Table 14 in Bowditch gives the correction for a "short horizon". The
    "Explanation of Tables" section gives the formula.
    
    
    
     -- Peter
    

       
    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