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
    or...
       
    Reply
    Re: Northern Limits of Magnetic Compass Usefulness
    From: Gary LaPook
    Date: 2019 Jun 4, 15:19 -0700

    Oersted is a measure of the H field and Tesla is a measure of the B field and, although not exactly the same thing, in free space they can me considered to be the same. So one micro Tesla is the equivelent of 0.01 Oersted. So the 0.06 Oe curve of erratic compass relability in the HO 216 is the equivalent of the 6000 nT curve in the newer chart. shifted a bit towards Russia as the magnetic pole has moved. http://www.hkd.co.jp/english/unit_conv/

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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