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: Welcome Aboard! New and returning...
    From: Lu Abel
    Date: 2011 Feb 7, 07:54 -0800
    I have to disagree.  In many cases, ice is broken into plates which are heaved on atop another by natural forces, so I don't believe that an iced-over body of water can be reliably used for a horizon.

    I also disagree that if one were lucky enough to find a body of water frozen over with a perfect sheet of ice that the thickness of the ice would have to be subtracted from HE.  If one is standing on a perfect sheet of ice, what's the difference between that and standing on a perfect sheet of water?

    Welcome to the list .....

    Lu Abel

    From: "Anabasis75@aol.com" <Anabasis75@aol.com>
    To: NavList@fer3.com
    Sent: Mon, February 7, 2011 7:09:40 AM
    Subject: [NavList] Re: Welcome Aboard! New and returning...

    You can always subtract the ice thickness from your Height of eye calculation.
    You are lucky that your Celesticomp is still working.  I can't help you with it's built in Almanac since I haven't even seen one in 3 years.
    In a message dated 2/7/2011 6:30:13 P.M. Bangladesh Standard Time, rtrowbridge@svprecipice.com writes:

    Thank you for the welcome.
    I do have a question about using the horizon on the frozen ocean. Does having four feet of ice over the surface of the ocean affect the accuracy of a shot?

    I also wonder if anyone knows how long the database in the Celesticomp V is good for?

    Thanks ahead of time!
    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

    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