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: Consistent error question
    From: Greg Rudzinski
    Date: 2014 Oct 3, 08:46 -0700

    The correct date for the 10 AH Sun observations is the day of posting 2 October 2014 (not 1 October as seem on the work sheet). My smart phone , which is smarter than me, used the correct date for the reductions. If reductions are done for 1 October then 20 NM intercepts will result from the known GPS position which is a mistake red flag. I hate it when I lose a day :(

    Greg Rudzinski


    From: Greg Rudzinski
    Date: 2014 Oct 2, 18:07 -0700


    See attached a set of 10 Sun observations from this afternoon using an AH H2O shielded, Navy MK 3 sextant with 2 power scope, stopwatch with split function, and Palm Pilot cell phone app. 5 index error checks were made that averaged close to zero. Intercepts were all better than 1' with the average at 0.2' away. Its still a small sample but there is probably a few tenths of index correction to add. The Sun was superimposed for determining index error and AH altitude. You should quickly be able to improve intercepts to no worse than 1.5' with practice and some statistics.

    Greg Rudzinski

    Attached File: 
    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