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: Left-handed Plath Coutinho Sextant
    From: Jackson McDonald
    Date: 2017 Feb 6, 02:21 +0000

    Thanks for enhancing my vocabulary:  "chirality."  

    I had to look it up. 

    On Feb 5, 2017, at 8:29 PM, Frank Reed <NoReply_FrankReed@fer3.com> wrote:

    If it's backwards then it's a right-handed sextant. The normal sextant is clearly designed for a left-handed user. At some point in the 19th century, via spontaneous symmetry breaking, the standard design became frozen with the minority chirality. It's the revenge of the southpaw navigator!

    Frank Reed

    PS: Here's an off-topic image of left and right handed tetrahedral molecules --which I can't resist given today's topics of discussion about handedness and tetrahedral points. Meanwhile, at the very instant I was composing this message about Gago Coutinho, a friend texted and asked if I was watching Gaga. No relation that I am aware of.

    Attached File:

    View and reply to this message

    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