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: Measuring (and Calculating) Dip - sighting technique
    From: Bill Morris
    Date: 2013 Mar 20, 20:27 -0700

    Hi Bruce

    As far as I remember, most of the time the horizon, though difficult to define exactly because of its irregularity, remained in the same place and then suddenly rose or fell (and not because I leant on the tripod!). When I have time, I will see if there is indeed a periodic rise or fall, but I am inclined to think that if there had been I would have adopted some sort of averaging process. At the time, we were in the middle of a large area of high pressure and there was no wind to make my anemometer rotate, so practically no waves to superimpose on the swell.

    Bill Morris
    New Zealand
    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?

    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