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: Bowditch (2002) Table 17
    From: h.a.c. van Asten
    Date: 2012 May 1, 00:54 -0700

    In the 1940 issue those tables are named no. 8 , 9 & 10 . The no.10 explanation says that for aircraft using the bubble sextant , the observed altitude must be corrected for refraction only (as is always the case for bubble sextants). For conservative celnav , bubble sextants are now (contrary to the 1930-1940 era) commonly in use . Table 9 (1940) was for short distances only , no dip applied . Table 8 (d=1.15 x sqrt h automatically contains horizon dip . Is this possibly the answer to your question ?
    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com
    ----------------------------------------------------------------

       
    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