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
    New Artificial Horizon Finally Tested
    From: David Pike
    Date: 2015 Apr 7, 12:20 -0700


    Today’s sunshine also gave me the chance to try out the DP Artificial Horizon Mk2 (Below).  This uses the mirror from a 1950s style airman’s locker (they don’t make them like they used to).  It ought to be big enough to allow shots on three stars without reorientating it.  I haven’t glued the round spirit level on, so that I can move it around, but I have to remember to put it in my pocket when I’m finished. The first Sun shot was centre to centre and came out about 3.5nm away from my true position.  The second was edge to edge and was spot on, which was too good to be true, so it must have been a fluke.  On the other hand, it might have been 32 miles out.  I was having great difficulty deciding which was which image and thus which the top and bottom edges were.  I think/hope I shot the tops.  I just couldn’t get the shades effective but different.  At least the brightness made it easy to ignore ghosts.  The DPAH Mk2 is much more practical and less messy than the DPAH Mk1 which used a gallon of oil in a biscuit tin.  Hopefully, if there aren’t too many dead flies in it, I can use the oil in Zephyr.  Dave




    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