Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Fwd: Slide Rule vs HO229 and 249 Interpolation Tables
    From: Mike Burkes
    Date: 2003 Jun 1, 16:15 -0700

    >From: MIKE BURKES 
    >Reply-To: Navigation Mailing List 
    >Subject: Slide Rule vs HO229 and 249 Interpolation Tables
    >Date: Sun, 1 Jun 2003 13:05:40 -0700
    >Hi folks and thanks for reading. I have a subject that I have been wanting
    >to post for some time and it may be old stuff for some of you but I have
    >seen a formal discussion on it. Simply it involves the use of a slide rule
    >or it's nautical and aviation equivalents the Nautical Slide Rule and E6b
    >computer respectively to determine the "d" correction from HO 229 and 249
    >added to tabulated altitude Ht to get Hc. The setup is d value over 60 = d
    >correction over declination minutes. It works great for me eliminating
    >double second differences, page turning, i.e. very convenient and
    >Of course an electronic calculator can directly solve for d correction but
    >the whiz wheels are truly non electronic and a" flick of the thumb" is all
    >it takes as a number of you are well aware! Would love to hear
    >comments,criticisms,etc. Thanks! Yours Truly, Mike Burkes.
    >Add photos to your e-mail with MSN 8. Get 2 months FREE*.
    The new MSN 8: smart spam protection and 2 months FREE*

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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