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: Traditional navigation by slide rule
    From: Gary LaPook
    Date: 2016 Oct 26, 11:05 -0700

    And just to triple check my computation, HO 214 produces 66° 13.7' and 292.6. I programed a Casio PB-1000 calculator 30 years ago, to do celestial and great circle computations. Enter departure and destination coordinates and it calculates initial GC course and distance, rhumb line course and distance and vertex. Then select inertmediate longitudes or increments and it calculates the intermediate waypoints, the rhumb line course and distance between the waypoints, totals all the rhumb line distances and tells you how many extra miles over the perfect GC distance. 

    50° 43.3'N 127° 29.6'W

    to 

    53° 53.4'N 166° 32.5'W

    CG distance 1426.6 nm, initial course 292.9°, RL distance 1444.6, RL 18.0 nm longer than GC track, course 277.6°,  vertex 54° 20.3'N 156° 20.1'W

    130° W 51° 21.5'N, RL102.0 nm ,292.0°

    150° W 54° 10.8'N, RL 745.2 nm, 283.1°

    160° W 54° 16.7' N, RL 350.8 nm, 271.0°

    166° 32.5' W 53° 53.4' N, RL 231.4 nm, 264.2° 

    Total RL distance 1429.4 which is 2.8 longer than a perfect great circle track.

    Since the rhumb line is only 18.0 nm longer than a perfect great circle would it be worth doing especially if it takes you into high latitudes or other hazards?

    gl

       
    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