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: Early Land Navigation.
    From: David Pike
    Date: 2015 Feb 11, 00:52 -0800

    Frank A
    I thought I’d better check the idea would work up to Hs=90° without the observer having to dig a hole to stand in, and it does (see below), but he might have to adopt a kneeling, head down position, so we’re back to the ants up the shorts situation again.  It also means my new AH, shortly to be completed, is going to be obsolete before the varnish is dry.  So far I’ve only been able to test the idea with a wall mirror at 30° on the floor under a strip light in the ceiling, so I’m certainly not using long parallel rays, but it seems to work.  Dave

     



    File:



       
    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