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: Distorted horizon
    From: Frank Reed
    Date: 2013 Dec 19, 15:50 -0800

    Brad, you wrote:
    "3) In deep water navigation, with no 'floating islands' visible, the error introduced by the anomalous dip is within the normal margin of error for celestial. Take the sight and use as is."

    Right. It's something to be aware of. Historically the navigational solution was usually described as a "fix", but there was always an implied "error ellipse" around it. Today we can be more explicit about these things. If you suspect anomalous dip and have no other way of dealing with it, add a couple of miles to the dimension of the error ellipse. In mid-ocean, it may make no difference.

    -FER

    PS: I don't have any barometers left to trade after the last game. :) I'll have to visit Murphy. He probably has barometers, too.

    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com
    ----------------------------------------------------------------

       
    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