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: Fix from 2 Bearings
    From: UNK
    Date: 2003 Jul 11, 11:30 -0400

    On Friday, July 11, 2003 10:43 AM
    Dan Allen  asked:
    > I sighted Mount Baker at 50 degrees east of North.
    > I sighted Mount Rainier at 140 degrees east of North.
    > The compass was uncorrected for magnetic deviation for these readings.
    >  From http://www.ngdc.noaa.gov/cgi-bin/seg/gmag/fldsnth2.pl the magnetic
    > deviation for this location and date is 18d 47m East.
    >Determine the point of observation!
    I assume that we are to apply the correction for deviation ourselves...
    My FIX was at  48d 32.3'N  122d 44.0'W
    I used a spreadsheet I wrote that solves a two-LOP fix using rhumb
    lines determined by mid-latitude. I'm betting that the solution
    using great circles differs by no more than 0.1'.

    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