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: A little cel nav in practice
    From: Murray Buckman
    Date: 2022 Nov 29, 10:22 -0800

    Frank, you wrote:

    "Using his exact value of 4.5' for dip implies a height of eye of 21.5 feet using standard dip calculations or tables. Isn't that rather low for a big oil tanker?"

    I wondered about that too.

    I think your follow-on comment about using a lower deck is probably correct, though I get your point about even a suitable lower deck being higher that the dip correction implies.

    Why use a lower deck?  Perhaps to avoid the jokes from those on bridge as you take out your "obsolete" tools and proceed to take sights.  Perhaps, if the celestial objects of interest appear on the leeward side of the ship, for a little shelter.

    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