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
    Re: An artificial horizon opportunity?
    From: Paul Dolkas
    Date: 2017 Jan 28, 14:51 -0800

    You can get really thick gear oil (SAE 80 wt or even SAE 140 wt). Stuff is really thick, almost like honey. I used to use it for an AH before I got a bubble sextant. Would take quite a breeze to put ripples in it.


    Paul Dolkas


    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Bill Lionheart
    Sent: Saturday, January 28, 2017 7:59 AM
    To: paul@dolkas.net
    Subject: [NavList] Re: An artificial horizon opportunity?


    I found "baby oil" ie mineral oil a clear distillate of paraffin oil
    but easily obtainable in pharmacists,a bit better than water as it is
    a little more resistant to ripples (is that due to viscosity?). I pour
    it in to a black plastic tray.
    On 28 January 2017 at 00:28, Alan S  wrote:
    > for shots with an AH, I use a dish of water, with some sun/wind shades in
    > the parking area of the apartment complex we reside at. It has worked quite
    > well,with my calculated position being within a couple of miles of GPS
    > position most of the time.
    > Alan
    > View and reply to this message
    Professor of Applied Mathematics

    View and reply to this message

    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