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: Old style lunar (in expert hands)
    From: Fred Hebard
    Date: 2004 Dec 10, 22:32 -0500

    On Dec 10, 2004, at 10:20 PM, Fred Hebard wrote:
    > On Dec 24, 2004, at 6:49 PM, Kieran Kelly wrote:
    >> Its only disadvantage on land is that it is somewhat larger and
    >> heavier than a sextant.
    >> "Precisely. A theodolite with hardwood tripod legs weighs about 4x
    >> times as
    >> much as a sextant. Eg I own a Wild T1a theodolite. The combined weight
    >> of
    >> instrument, carrying case and tripod is 12 kgs. The  Zeiss Yachtsman
    >> sextant
    >> and case which I use on expeditions weighs 2.8kgs.
    > A Wild T1 might only weigh 12 kilograms, but the ones used in the 1840s
    > for the Survey of India were more on the order of 120 kilograms.
    > Fred
    I should add that an 1800s sextant with stand was probably around 10 kg.

    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