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
    What is this device?
    From: Bill Wood
    Date: 2019 Nov 2, 19:59 -0700

    Greetings to all.  I am a landlocked maritime enthusiast from the US and new to this forum.  I am posting at the recommendation of Bill Morris after I wrote him with a question.  I have recently come into possession of a rather unusual device that appears to be a navigational tool.  There are three concentric geared rings, allowing the scope to move on all three axes.  It appears to be designed to gimbal, or rest on knife edges as Dr Morris suggests.  In his response to me he wrote, "I suspect it is a device to give a direct solution to the navigational triangle without using tables or calculations." I am including a few pictures for general perusal, and welcome any and all suggestions as to what I may be holding.  Please advise if I can provide additional images or views that could be helpful.

    File:


    File:


    File:


    File:


       
    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