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: Samuel L
    Date: 2015 Nov 24, 17:09 -0800

    Sean,

    Thank you for the effort which looks considerable.  I noticed in Bowditch Chapter 24, "The Sailings" mention of the Traverse tables.

    Also, I gave these a try and they work-

    DR Longitude = Lf+t(V/60)sinT/cosBf

    DR Latitude = Bf+t(V/60)cosT

    ...where

    • Lf = Longitude of the last fix
    • Bf = Latitude of the last fix
    • t = Time elapsed
    • V = Speed
    • T = Course

    Very nice.

    Thanks,

    Sam L.

       
    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