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: Navigating Around Hills and Dips in the Ocean
    From: Dan Allen
    Date: 2003 Aug 16, 21:32 -0700

    On Wednesday, August 13, 2003, at 07:29 PM, David Hoyte wrote:
    
    > I heard as far back as 1975, at the IBM Maritime Center in
    > Italy, that a large ship will use significantly more fuel if it passes
    > down into a gravitational dip and climbs the other side, rather than
    > following a longer path around the dip which will keep it more "on the
    > level".
    
    Hmmm.  How could these dips be known about almost 30 years ago before
    GPS?
    
    Also, can you give a better reference for this Maritime Center?  A
    search on Google does not show any IBM Maritime Centers - in Italy
    or anywhere else - and I doubt that IBM would even have a Maritime
    Center, unless they made a donation to something that caused their
    name to be prefixed to an existing organization.  Nevertheless, I
    cannot find any IBM Maritime Centers (or Centres) that are known
    publicly by that name.  (What would the Italian name be?)
    
    Dan
    
    
    

       
    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