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: Using sun compass for calibrating boat compass
    From: Greg Rudzinski
    Date: 2014 Jun 20, 10:24 -0700

     Bill,

    Not sure what you have done. If near the prime vertical then the azimuth formula will give a more accurate result if LHA(t) for the assumed longitude is adjusted to the LOP EP longitude and Ho substituted for Hc. This would only be done when the calculated azimuth is needed to tenths of a degree. If making an observation exactly on the prime vertical then knowledge of exact latitude and declination is required for the formula sin Hc = sin d / sin L

    http://fer3.com/arc/m2.aspx/Using-sun-compass-for-calibrating-boat-compass-BillB-jun-2014-g28091

       
    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