Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding

Compose Your Message

Add Images & Files
    Re: S-tables: where to have a look at them?
    From: Stan K
    Date: 2017 Mar 20, 14:55 -0400

    The way I was taught, your DR position is determined strictly by planned course, speed, and time elapsed, to determine estimate distance traveled and position.  Current/leeway is not considered in determining a DR position, so if you do get a good fix by some method, you can then compare your DR position to your fix and determine the effects of current/leeway.  You reduce a single sight from your DR position, draw the LOP on your DR plot, then draw a line from your DR position perpendicular to the LOP.  The point where the line intersects the LOP is your EP, a position more probable than your DR position, but not as good as a fix.  However, once the current/leeway is known (or at least estimated), the EP can be adjusted accordingly.

    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