Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Things to take on a container ship voyage
    From: Greg Rudzinski
    Date: 2017 Jul 9, 09:51 -0700

    David,

    I reduced your star fix using my smart phone app and to my surprise it pin wheeled on the standard plotting sheet. To open up the cocked hat required scaling a nautical mile to 1 cm (see plot). Not sure if you had applied the 5 second chronometer time correction to your working notes and plot. 

    In another thread we had been discussing systematic error and where to place the fix. Your posted round of stars shows how a round of stars with well spaced azimuths will give the same fix whether index error is applied or not. The only difference is the size of the triangle.

    A great set of real world observations ! Thanks.

    Greg Rudzinski



    File:



       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    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