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: Calculate new coordinates given bearing and distance?
    From: David Pike
    Date: 2015 Nov 26, 00:44 -0800

    It's too difficult to figure out.  No idea where to begin figuring it out.  Sam

    Sam.  Until you give a distance, no one will commit themselves with figures, because they’re frightened of being shot down by a more knowledgeable geographer/mathematician.  However, here's a ‘rule of thumb, flat Earth’ navigator’s way of doing it.

    If waypoint A is lat 60N 000E/W and you travel 60nm in a direction 060°.

    Increase in latitude (northing) = 60nm x Cosine 60° = 60 x 0.5 = 30nm. Therefore, latitude of B = 60° 30’N

    Distance travelled east (easting) = 60nm x Sine 60° = 60 x 0.866 = 52nm.

    Change easting into minutes of longitude = 52 x Secant 60° = 52 x 2 = 104’ east

    Therefore, lat and long of B = 60° 30’N 001° 44’E.

    I bet even a dunce like me could turn that into an Excel spreadsheet, but I’m not going to.  I’ll leave that up to you.  Look after the degrees and the signs (and sines) will look after themselves. E.g. enter 'cosine 240° ' on a calculator, and it'll come up minus automatico. That explains why with some mapping applications on the Internet longitudes don't come up in E & W; they come up in + and minus.  DaveP

       
    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