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: Other uses for USNO Navigational Star Chart
    From: Greg Rudzinski
    Date: 2015 Nov 26, 14:54 -0800


    The better tool for star sight planning is the 2102-D starfinder. The starfinder is set to LHA Aries for time of twilight and gives the approximate altitudes and azimuths of available navigational stars to preset the sextant. The USNO star chart (PDF attached) could be used for determining star meridian passage but not good for selecting a perfect round of stars (azimuths 120° apart).

    Greg Rudzinski

    From: Samuel L
    Date: 2015 Nov 23, 12:47 -0800

    I've found the USNO Navigational Star Chart to be very helpful in planning star shots but am wondering if it the chart can be used for other purposes such as;

    - determining GHA Aries for when a body will be at a certain altitude

    I've tried putting a parallel rules across on a diagonal so that they touch 180 and 360 (or 0 and 180) and moving them around to obtain a fairly close GHA Aries can be used for, say, when Sirius is just on the horizon (converting to LHA).

    I'm probably doing something wrong.

    Any ideas?


    Sam L.



    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