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
    Name or NavList Code:
    Re: Mixter's P. of N. and syrup in an A.H.
    From: Doug Royer
    Date: 2005 Feb 22, 12:27 -0800

    On Tue, 22 Feb 2005, Royer, Doug wrote:
    > I made a flat,triangular reflective A.H.
    > out of dark plexiglass last year.
    > It has 2 bubble levels( $ 3.50 each)
    What is the accuracy of this A. H. ?
    It was good enough to give me positions within 2 mi. of a gps pos while
    travelling in Indian country(while going cross-country).
    It's near impossible to keep an accurate dr while travelling
    cross-country.When sights were attempted 1st I had to take cross bearings
    from terrestial landmarks,convert the mag bearings to grid bearings,plot the
    pos on the projection to find the eastings and northings coordinates that I
    was going to use as my sighting position. 2nd set up the gear to shoot and
    then take sights when available. There is just to many variables in all this
    when doing it "real time" in less than idea conditions(terrain,weather and
    state of fatigue).
    If I had to have relied on only sight reduced positions,map work and
    bearings we would have been close enough at the end of the trip(20 days)to
    be less than a day's hike/ride from where we were to be picked up.
    So as for accuracy..........accurate enough to get us where we needed to
    be.Sorry,I can't be more specific than that.
    The flat A.H.  and an Astra IIIB sextant is what I used(along with a Palm OS
    based sight reduction program) on the entire trip.

    Browse Files

    Drop Files


    What is NavList?

    Get a NavList ID Code

    (please, no nicknames or handles)
    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 Settings

    NavList ID 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