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: Finding Longitude from LST
    From: Sean C
    Date: 2020 Aug 18, 02:28 -0700

    R William McAllister wrote:

    "... we also learned how the "clocking" of the Chair of Cassiopia relative to the 'pole' star might be used to determine an approximate correction to the observed 'latitude.'"

    The "nocturnal" that I mentioned earlier has a set of scales on the reverse side which are exactly for this purpose. (See attached pic.) The inner scale is for the "Great Bear" (Dubhe in Ursa Major) and the outer for the "Little Bear" (Kochab in the Ursa Minor). You look at Polaris through the center hole and align the arm with either of those two stars, then read off the correction from the appropriate scale.

    Regards,

    Sean C.

    File:


       
    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