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
    Re: Bygrave Equations with a Calculator
    From: David C
    Date: 2020 Dec 25, 19:17 -0800

    Frank wrote

    Of course, if you have a calculator, there's no reason to use the Bygrave equations except to confirm your paper calculations. But if you're checking paper calculations, then go ahead and run them up on your calculator without worries.

    Frank maybe you can clarify something for me. A while ago I was browsing and found a forum in which the members were discussing how to calculate the distance between two points. They were excited because they had discivered haversines and believed that the function gave better accuracy than the cosine. I think that they were confused. IIRC  the haversine was introduced because you cannot take the log of a negative number. The only reason you would use logs is if you were doing the calculation manually. The forum was clearly about electronic calculations so I concluded that their use of the haversine was completely uneccessary.

    As an aside if they were talking about short distances than Pythagoras would have sufficed.

    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