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:
    Error: B45a Error: B25 Error: B45a Error: B25 Error: B45a Error: B25 Error: B45a Error: B25 Error: B45a Error: B25 Error: B45a
       
    Reply
    Re: Making an artificial horizon
    From: Greg R_
    Date: 2011 Jan 19, 18:26 -0800
    Davis also makes one that includes wind-shades (and filters, too) - works really well, but probably not quite a much "fun" as making one yourself.  ;-)

    http://www.davisnet.com/marine/products/marine_product.asp?pnum=00144
    http://www.celestaire.com/Sextant-Accessories/Davis-Artificial-Horizon.html
    http://www.sailingmagazine.net/how-to/technique/620-celestial-navigation-

    --
    GregR


    --- On Wed, 1/19/11, Gary LaPook <glapook@pacbell.net> wrote:

    From: Gary LaPook <glapook@pacbell.net>
    Subject: [NavList] Making an artificial horizon
    To: NavList@fer3.com
    Date: Wednesday, January 19, 2011, 6:15 PM

    I think we have all had the experience, when using an artificial horizon, that just as you are ready to
    take the reading a puff of wind ripples the surface. I finally got around to making an enclosure to
    prevent this. I purchased two 5 by 7 inch pieces of glass, sold to replace broken glass in picture
    frames at a craft shop, four dollars each. (The also come in larger sizes.) I taped one edge of the
    glass together with clear packing tape. I used a piece of the cardboard packaging to make a base by
    using blue masking tape to tape the bases of the glass to this cardboard, creating an equilateral
    triangle. I then used other pieces of the packaging, cut into triangles, to make the sides, one attached
    all around with tape and the other attached only to the base piece so that it can be opened to insert
    the small bowl of liquid, I use mercury. This side is held closed with a small piece of tape. I cut a
    circular opening in a piece of cardboard to place over the bowl of mercury to act as a stop to prevent
    seeing the edges of the liquid where the horizontal surface is distorted by a meniscus. I have
    attached several photos of this, one showing the moon’s reflection peeking around my chimney.

    gl
    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com
    ----------------------------------------------------------------

    Linked File: https://www.NavList.net/imgx/IMG_6808.JPG
    Linked File: https://www.NavList.net/imgx/IMG_6811.JPG
    Linked File: https://www.NavList.net/imgx/IMG_6819.JPG
    Linked File: https://www.NavList.net/imgx/IMG_6817.JPG
    Linked File: https://www.NavList.net/imgx/IMG_6813.JPG

       
    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