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: Long-range airplane navigation
    From: Charles Seitz
    Date: 2004 Dec 2, 10:45 -0500

    I have seen references to daytime star sightings by the Astrotracker system
    that was used  to navigate the SR-71 'spyplane'.  Apparently, the system was
    completely automatic and the starlight was detected by a photomultiplier
    tube. No visual observations were required.
    I also recall references to a different scale for measuring the brightness
    of the stars because the spectral sensitiviy of  the auto-tracker sensor is
    different then that of the human eye.
    ---  CHAS
    ----- Original Message -----
    From: "Fred Hebard" 
    Sent: Thursday, December 02, 2004 08 57
    Subject: Re: Long-range airplane navigation
    >I was asked an interesting question, which was:  could star shots be
    > made during the day with a bubble sextant?  The intent would be to get
    > more than one line of position during one round of shooting.

    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