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: Spur of the moment long by chron
    From: David C
    Date: 2018 Dec 18, 18:04 -0800

    Brian wrote

        You seem to infer on Dec 16 that  the use of the expression “longitude by chronometer” tailed off after the 19th century, and is somehow wrong. Attached is a page from my 1956 Nories,  and a page from my 1985 Reed’s Nautical Almanac, this latter page title reproduced exactly in the dozen or so annual Reed’s almanacs I have to hand, going up to at least 1992. The methodology is evident in these attachments.

    Thanks for posting the page from Nories. I have several copies of Norie and wondered why I had not seen that explanation before. The answer is that I do not have a copy of the 1956 edition. The information is given in other editions but not in such a clear manner. I must keep a look out for the 1956 edition of Norie.

    In 1918 and 1944 the phrase "longitude by chronometer problem" was used. In 1970 and 1983 the phrase used was  "finding the computed longitude when establishing the position line by the chronometer method". Even if we accept that all observations result in a position line I  believe that it is legitmate to refer to a "chronometer" method - at least, in British practice.

    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