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: New compact backup CELNAV system
    From: Gary LaPook
    Date: 2009 Feb 25, 13:39 -0800
    I haven't seen the problem you mentioned. I sealed the Cotangent scale in normal plastic protection sheets (about one buck each at Fryes) used for protecting documents which are quite rigid. I will experiment with bending the scale and working a sample problem and get back to you.

    gl

    --- On Wed, 2/25/09, nsg21@hotmail.com <nsg21@hotmail.com> wrote:
    From: nsg21@hotmail.com <nsg21@hotmail.com>
    Subject: [NavList 7427] Re: New compact backup CELNAV system
    To: NavList@fer3.com
    Date: Wednesday, February 25, 2009, 9:47 AM

    I would like to share some experience in using this (transparency over printed)
    style of the slide rule. The surface it is placed for calculation MUST BE
    ABSOLUTELY flat. Even small warping of the surface (such as normally found on
    small plastic tables) leads to big errors in calculations.



    From: glapook---NET
    Date: Tues, Feb 24 2009 12:06 pm
    > There are often posts on the Navlist regarding using celestial as a backup
    to
    > GPS and finding a simple way to do this. I think I have found a method
    that
    > is simple, self contained, takes up little space, needs no almanac or
    sight
    > reduction tables
    ...





    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To , email NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a 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