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: 60° Pendulum Astrolabe
    From: Frank Reed
    Date: 2016 Jul 20, 12:42 -0700

    Phil Sadler, you wrote:
    "Just bought an intriguing instrument on eBay, a USNO-designed, WWII-vintage 60° pendulum astrolabe. Such devices are credited with being capable of GPS-like accuracy of 15 feet (1/400 NM) for the U.S. Army!" [more here]



    And:
    "Anyone care to place a wager on the ultimate accuracy of this incredibly impressive piece of hardware?"

    Well, I really expected you would get lots of interest in this, which was why I suggested you make a NavList post, and yet look... our assembled membership has nothing to offer! Maybe this little reminder will draw some replies.

    Frank Reed

       
    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