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: Thoughts on Celestial.
    From: Greg Rudzinski
    Date: 2012 Nov 3, 07:00 -0700

    Sean,

    This same technique is also useful for determining the distance to the far shore of a lake so that dip short corrections can be applied to CN observations.

    Greg Rudzinski

    [NavList] Re: Thoughts on Celestial.
    From: Sean C
    Date: 2 Nov 2012 23:44
    "If you are on a hight hill an estimation of you height
    above your horizon will give some idea to how far your horizon and other objects are." -Byron Franklin

    There is another formula for finding distance to objects I have learned for use with a lensatic compass:

    1. Take a bearing on an object in the distance.
    2. Walk in a path perpendicular to the bearing for a set distance, say 10 meters.
    3. Take another bearing on the object.
    4. Find the difference in degrees (or mils) between the bearings by subtracting the smaller from the larger one. Subtract the answer from 90° (or 1600 mils) to find the complimentary angle.
    5. Calculate the tangent of the complimentary angle.
    6. Multiply the distance walked by the tangent. The answer is the distance in meters. (Although any unit of measurement can be used as long as it is consistent throughout.)

    This website has some great PDFs dealing with navigation on land and includes a more thorough explanation of the above:

    http://www.landnavigation.org/

    ----------------------------------------------------------------
    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
    ----------------------------------------------------------------

       
    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