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: Problem with a sextant
    From: Bill B
    Date: 2006 Apr 26, 20:19 -0500

    Peter wrote
    > An inaccurate DR will lead to longer intercepts, an inherent enemy of
    > accuracy. The remedy is to take the indicated Fix as an improved DR and repeat
    > the sight reduction exercise.
    > Incidentally, methods of sight reduction that use a presumed DR expressed in
    > whole degrees suffer the same inherent defect. From reading this List, and
    > other sources, such methods seem the most popular today; presumably because
    > they remain the main methods taught. An example of the triumph of inertia over
    > an informed mind.
    I am at the point that I can whip out Hc and Zn in 3-4 minutes on my TI-30XA
    (3 memories) with no paper or pencil needed from any AP I wish.  I am glad
    that I learned a tabular method first as it gave me a better understanding
    of what was going on, and provides me with a backup to calculator methods.
    I do agree I prefer a short intercept. Regarding long intercepts and
    accuracy, the offset table can to help nudge a point on a an LOP a long
    distance from the intercept to better approximate the COP.

    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