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
    Name or NavList Code:
    Re: Horizon refraction: photos of changes
    From: UNK
    Date: 2013 Apr 20, 16:12 -0700


    I just wonder where to find a location that is "a good one for making refraction dependent measurements"? I guess you may handpick a few selected places in the open ocean that are far from land and free of currents. Unfortunately, these are the places where the navigator has the least interest in exactitude.

    Most places where we navigate feature notorious warm or cold surface currents with side arms, changing eddies, counter eddies and what not. While they are often obvious to the naked eye, the corresponding abnormalities of refraction go undetected. Frank's photos show that they must be there.

    Herbert Prinz

    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

    Browse Files

    Drop Files


    What is NavList?

    Get a NavList ID Code

    (please, no nicknames or handles)
    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 Settings

    NavList ID 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