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: Navy MK 5 Octant Using Natural Horizon
    From: Greg Rudzinski
    Date: 2012 May 1, 11:38 -0700


    Here is a sample of ten observations using the preset method. By presetting I am on an exact moa of the micrometer drum so the measurement precision will be about 0.2' moa . When I don't preset then I am doing a visual interpolation which is at best within 0.5' moa. For the data (Hs) is the actual altitude reading taken from the octant micrometer drum.

    I.C. = +6.0' moa (add to each Hs value)
    H.E. = 8.5 ft.
    Sun at lower limb
    Assumed Latitude 34* 10.2' N
    Assumed Longitude 119* 14.0' W

    Date 4/29/2012 UT

    UT 21:21:39 Hs 62* 2' intercept 0.5' away
    21:23:32 Hs 61* 44' intercept 0.3' away
    21:24:58 Hs 61* 30' intercept 0.3' away
    21:26:15 Hs 61* 18' intercept 0.3' toward
    21:27:36 Hs 61* 4' intercept 0.3' away
    21:28:49 Hs 60* 52' intercept 0.2' away
    21:30:58 Hs 60* 30' intercept 0.7' away
    21:34:08 Hs 59* 58' intercept 0.5' away
    21:35:47 Hs 59* 42' intercept 0.4' toward
    21:37:08 Hs 59* 28' intercept 0.3' toward

    Sight reductions were performed by Pilot Navigator Software Version 6.9

    Greg Rudzinski

    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com

    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