Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    App or program to find Hc just from lat, dec and LHA?
    From: Francis Upchurch
    Date: 2015 Dec 4, 07:15 -0800

    To check the accuracy of my Bygrave and BN, I currently need to use the cosine formula with a calculator which is fairly tedious and time consuming. All the sight reduction apps I've seen need you to input sextant sight details etc. They are great for an actual sight reduction, but for a quick check of my my slide rule results, I really just need a quick app or program which gives me Hc from just Lat, Dec and LHA.

    Could any of the experts recommend one or teach me how to program an HP 67 calculator emulator (free app) to do it? (by the way, I'm old enough to remember the HP67 from the late 70s. A dream machine which I could never afford ($600 then!)

    Many thanks


    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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