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
    Name or NavList Code:
    Email:
       
    Reply
    Re: How accurate are fixes in practice?
    From: Andrés Ruiz
    Date: 2008 Jul 14, 10:11 +0200

    I am writing an article about Position at LAN, and the real example will 
    appear in it. But now I like to spend the little free time I have sailing, 
    after some days cleaning and painting the hull with antifouling. A few weeks 
    ago, sailing for four days I could not make any shoot, neither day nor night. 
    The sky was completely covered.
    
    What is acceptable for me?
    What is the purpose of calculate our position? Knowing where you are, or 
    better, knowing where you are not.
    
    Ashore I am able to fit my position inside a circle of 2.5 nm of radius, 2/3 
    of the shoots inside a circle of 1 nm.
    Aboard a sailboat, a small one, 8 m length, the things go worse: 7, 8 and also 
    10 nm. But in some circumstances, the fix could be acceptable, depending 
    where the coast or shallows are.
    
    See the two charts with real fixes, one a celestial fix, (acceptable but dist 
    GPS, Fix = 6.9 nm ), and the other more accurate, a coastal 3 bearing fix, 
    position inside the triangle.
    
    Andrés
    
    
    -----Mensaje original-----
    De: NavList@fer3.com [mailto:NavList@fer3.com] En nombre de George Huxtable
    Enviado el: viernes, 11 de julio de 2008 17:32
    Para: NavList@fer3.com
    Asunto: [NavList 5798] Re: Noon sight for longitude
    
    ...
    Andres Ruiz wrote-
    
    "Also I try this method aboard a sailboat and the results are acceptable due 
    to the waves and roll and pitch"
    
    That's intriguing. It would be interesting to see the numbers he came up 
    with, in real-life; and what he considered acceptable.
    ...
    
    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To , email NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

    File:


    File:


    File:


    File:


       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID 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