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
    Davis M3 --> (Davis M20) --> Astra IIIb
    From: Joe Shields
    Date: 2001 Apr 21, 1:05 PM

    I learned Celestial with a Davis Mark 3.  On land using an artificial
    horizon or at the lake using a short-dip correction I'm consistently within
    +/- 1nm on Sun shots.  My question is... is there anything to be gained by
    moving up to one of the better Davis sextants (which financially I could do
    now... at least for a used one) or should I keep saving my money for an
    Astra IIIb?
    -- Joe (small lake sailor/ blue water sailor wannabe)
    > ----------
    > From-         Dan Hogan[SMTP:dhhogan@VERIOMAIL.COM]
    > Reply To:     dhhogan@VERIOMAIL.COM
    > Sent:         Saturday, April 21, 2001 12:58 PM
    > Subject:      Re: Any happy/unhappy Astra IIIB owners here?
    > I started out navigating with a Davis plastic sextant in 1963(?) or there
    > abouts. I used it on trips to/from Hawaii, Baja, and up/down the coast.
    > For a
    > small boat it kept an accuracy of 4 Nmi+/-. Used it up to 1984, when I
    > left
    > it laying on a plastic cushion on the way to Santa Catalina Island one
    > summer
    > day, it tried to turn into a ball. Then I bought a used Huson, I used it
    > until I got talked into exchanging it for a Freiberger.
    > IMO a top of the line sextant is required only if you are going try
    > Lunars.
    > Otherwise, for *PRACTICAL* small boat navigation, most modern sextants
    > will
    > work admirably.
    > Consider these errors:
    >         Your eyesight
    >         Boat motion
    >         Your plotting error
    >         Your method of sight reduction
    >         Any time error
    >         And, any errors in the charts
    > Dan Hogan WA6PBY
    > Catalina 27 "GACHA"
    > dhhogan@verimail.com
    > Navigation-L List Owner
    > http://www.wa6pby.com

    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