Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
    Re: book - the complete on-board celestial navigator
    From: Kieran Kelly
    Date: 2003 Mar 25, 10:43 +1100

    Gentlemen,
    
    I came across the Complete On Board Celestial Navigator shortly after
    becoming interested in celestial navigation. I knew a little but not a lot
    about the subject when I first looked into George Bennett's book, after
    teaching myself from Susan P Howell's book. While the latter is an excellent
    primer it should not be compared to Bennett's book - they seek to do two
    different things.
    
    Using Howell's book the navigator will still need to invest in and carry a
    current nautical almanac and set of often multi-volume tables such as HO
    229. This is both expensive and bulky for yachting use. The great benefit of
    the Bennett book is that it is all there in one compact, light and cheap
    offering. The only sacrifices made are a slight loss in accuracy -
    negligible - and a need for limited interpolation.
    
    Bennett makes clear at the front of his book that it is intended as a backup
    for electronic methods of navigation and that it was prepared primarily with
    an eye to convenience and cost and I think it fills those aims admirably.
    
    But the really outstanding feature of this book is his table of change of
    altitude of a celestial body for any Z and lat over 5 minute intervals. This
    enables easy averaging of sights without maths. This is something that I had
    not seen published anywhere else in navigation textbooks and I mean anywhere
    else stretching back to Raper and Norie in the nineteenth century. I use
    Bennett's tables constantly to check sextant sights for accuracy and
    eliminate personal error. If nothing else, the book is worth the cover price
    for access to these techniques.
    
    So for anyone interested in the science/art/practice of celestial navigation
    Howell and Bennet are both very worthwhile investments.
    
    
    Kieran Kelly
    
    
    

    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