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: Lunar mechanics and Double Alts.
    From: Doug Royer
    Date: 2003 Apr 29, 17:49 -0700

    Mr. Hebard,thanks for your help and confidence in this matter.My experiance
    of 04-26 was a great learning tool for me even though I failed to grasp the
    essance of what the exercise of "distances" was meant to be at the time.I
    believe I have it now.As for my success with the averaged Ho's of the
    reflected images it most definetly a function of the sextant I use.Yes,I
    have a good technique honed over many years of use.I look at it in the
    following way:I'm a good mechanic.I approach intercepts and such in a
    mechanical way.I know how to use the tools to get what I need.Where I'm
    lacking is understanding some of the concepts behind the mechanical steps
    needed to get the results.
    As for future officers I believe they will.As long as the U.S.C.G. requires
    celestial be taught and mastered to hold certain lisences.It is an officer's
    responsibility to meet certain criteria to hold a lisence not some company's
    responsibility.Most officers have to pay for it out of pocket.There are now
    and will be in the future those who are intregued by and trying to master
    observations useing fine equipment.Even with all the neat equipment on board
    it is still satisfying to do.
    -----Original Message-----
    From: Fred Hebard [mailto:Fred@ACF.ORG]
    Sent: Tuesday, April 29, 2003 15:59
    Subject: Re: Lunar mechanics and Double Alts.
    Dear Mr. Royer,
    Thank you for sharing your experiences with us.  It was certainly
    enlightening to read that your observed altitudes were within 0.1' of
    arc of your calculated altitudes.  It gives me something to aim for, as
    I still have standard errors of around 0.2' of arc, and the means only
    rarely get within 0.1' (although they are getting there more
    frequently!).  Part of it may be due to you superior sextant, but I am
    sure much of it is due to your superior technique, from years of
    experience.  I wonder whether sea officers just coming on board now
    will ever again achieve your level of expertise.
    Yours Sincerely,
    Fred Hebard

    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