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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Lunars work from logbook c.1830
    From: Modris Fersters
    Date: 2025 Dec 8, 10:19 -0800

    Dear Antoine,

    You asked: Are the "corrected Sun and Moon heights published here" corrected for "only dip and refraction", or rather - which actually seems [much] more logical - corrected for "dip, refraction and SD" ?

    It is clear that given Sun and Moon altitudes are apparent altitudes. It can be concluded by examing the logs 0,2283 and 0,1519 which are log cosecants of apparent altitudes. The clearing method used here is Bowditch 2nd method.

    Modris

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join / Get NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID 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