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: Exercise: Lower Transit
    From: Peter Hakel
    Date: 2009 Sep 19, 15:56 -0700
    Jeremy,

    I did not know how to interpret the Temp/pressure correction, so I just used standard conditions.  This is apparently another piece of terminology that I have yet to learn...

    This way I obtain the following coordinates of your vessel at the moment of observation:
    N 31 deg 28.7'
    W 74 deg 11.8'

    At that moment the GP of Kochab was:
    GHA: 254 deg 11.8'
    Dec: N 74 deg 07.1'

    The (west) longitude is given by the GHA minus 180 for lower transits.

    The altitude of the Pole (i.e. latitude) is the sum of the Ho (15 deg 35.8') and Kochab's colatitude (polar distance = 90 - Dec = 15 deg 52.9').


    Peter Hakel



    From: "Anabasis75@aol.com" <Anabasis75@aol.com>
    To: NavList@fer3.com
    Sent: Saturday, September 19, 2009 3:08:53 PM
    Subject: [NavList 9806] Exercise: Lower Transit

    A ship is sailing in the North Atlantic. on 15 September 2009.
    At 04h 09m 44s local time a lower meridian transit of the star Kochab was
    taken by moonlight.  Hs is 15 deg 50.3'
     
    Height of eye is 103 feet
    Index correction is -1.2'
    Temp/pressure correction is +.2
    ZD is +4
    The 1930 Star fix from the previous evening is
    Lat 30 deg 48.9' North
    Long 073deg 22.2' West
    Crs is 304  Spd 8.2 Knots
     
    Determine a 0409 Latitude.




    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---

       
    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