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: Titanic's last stars
    From: Paul Hirose
    Date: 2012 Mar 18, 16:54 -0700

    Greg Rudzinski wrote:
    > Early twilight starting at UT 2230 4/15/1912 ZD +3 Lat. 42* N Lon. 47* 30' W (Sun Hc -8*)
    
    How did you come up with the DR position and Greenwich time for the star
    sights? My original posting ought to have explained that the question 
    really boils down to her position and the UT at the last round of stars. 
    Those data being known, the likely stars should be easy to pick out. 
    (Admittedly, the list of candidates is not very sensitive to the time 
    and place.)
    
    I must say, the Sun elevation you get is more reasonable than the -12°
    in my original message. My value seems too low, and inconsistent with 
    Pitman's testimony: "We just took a set of them at sunset, or just as it 
    was getting dusk, when the stars were visible."
    
    I believe celestial lines of position were not the practice on Titanic. 
    More likely the officers shot ex-meridian sights for latitude and time 
    sights for longitude, the results being numeric rather than plotted on 
    the chart. I base this on testimony from Boxhall and Lowe during the 
    U.S. inquiry, quoted in my original message.
    
    -- 
    I filter out messages with attachments or HTML.
    
    
    
    

       
    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