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
    or...
       
    Reply
    Re: Traditional navigation by slide rule
    From: John Brown
    Date: 2016 Jan 22, 02:07 -0800

    It seems to me that the debate on the relative merits of dividing trig scales into degrees and minutes, or degrees and decimals, is futile until the length of these scales is decided.  Are we talking about cylindrical scales, in which case degrees and minutes are an obvious choice, or a ten inch slide rule where consistent precision of results to within 3' of arc seems highly doubtful, no matter which subdivisions of degrees are used?

    In an earlier life a major tanker company obliged us to record position fixes and other shipboard operations rounded to the nearest six minutes to faciliate various calculations. A little bit of practice at this soon made it second nature - perhaps that's my problem!

    John

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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