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: Bris sextant
    From: Alexandre Eremenko
    Date: 2016 Dec 11, 02:50 +0000

    Bris sextant is a toy, or perhaps an "emergency tool"
    but not a tool for navigation or for learning navigation.
    
    For all years that I own it, I had not enough opportunity even to grade it
    reliably. Not speaking of testing its accuracy.
    
    To grade a Bris sextant you have to spend several hours (doing nothing else!) 
    in sunny weather at the place with horizon 
    under the Sun non-obscured at all times, and be very attentive not to miss the "touching moments".
    And to obtain a reliable grading, you have to repeat this exercise few times.
    
    Observation with it also takes a lot of time, because you have to catch the "touching moment".
    And horizon at this moment must be clear, and the Sun must be clear of clouds, 
    and you cannot be distracted by anything at this moment.
    
    Al these conditions are much harder to meet than it seems. Presence of clouds 
    or any obstacles at the horizon
    may destroy the whole observation.
    
    Alex. 
    
    
    ________________________________________
    From: NavList@fer3.com [NavList@fer3.com] on behalf of Adrian Blunt [NoReply_AdrianBlunt@fer3.com]
    Sent: Saturday, December 10, 2016 5:23 PM
    To: eremenko---.edu
    Subject: [NavList] Bris sextant
    
    Hi All,
    
    I am new to NavList.  Found you through a Cruising Forum post.  I have read 
    all the Bris posts in the Navlist archives and have looked at Sven's website. 
     Does anyone have a Sven made, or a self-made, Bris sextant that they would 
    like to sell.  Unfortunately I do not have the dexterity and ability to make 
    one for myself.
    
    Thanks,
    
    Adrian
    
    View and reply to this message
    
    

       
    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