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: Martelli's Time-Sight Tables
    From: Hewitt Schlereth
    Date: 2012 Dec 23, 08:49 -0800

    Golly, Doug, I didn't think I had ordered Amazon's last copy. Going to A just 
    now it looks like there are a couple of copies of the paperback I have for 
    $10, and another old-fashioned looking hardback for $100. To find them you 
    have to enter most of the title, Short, easy . . . Just entering Martelli in 
    the search box doesn't cut it.
    
    I'll be interested to hear the physical details of yours when it arrives - 
    from India! What a world we live in!
    
    Merry Christmas,
    
    Hewitt
    
    Sent from my iPad
    
    On Dec 23, 2012, at 7:51 AM, Dwmacpherson2000  wrote:
    
    > I ordered a copy from India by way of ABE books online. I will let you know how it turns out. 
    > 
    > Doug 
    > 
    > 
    > 
    > Sent from my iPhone
    > 
    > On Dec 22, 2012, at 7:12 PM, Hewitt  wrote:
    > 
    >> 
    >> I ordered this book from Amazon and it came yesterday. Full title is 
    "Short, easy, and improved method of finding the apparent time at the ship."
    >> 
    >> It's a trade paperback, and I have to say Hewlet-Packard made a nice job of 
    it. The signatures are stitched, so they shouldn't come loose. The only 
    shortcoming with my copy is the print on page 42 and pages 44 thru 47 of 
    Table V is light (but still quite legible).
    >> 
    >> The tables are I thru VI and the method takes them in that order. What you 
    end up with is LHA expressed in time units, so you have to convert to the 
    angular units we are used to- 1 hour = 15*, 4 mins = 1* ...
    >> 
    >> After working through his English example (the same data is used for 
    directions in French, German, Italian and Spanish), I ran the example through 
    my HP 35s using the sine/cosine formula and it gave an answer 1.0' less than 
    Martelli.
    >> 
    >> Then I tried M's table with Greg's 12-17 time sight and again the difference was 1.0'. 
    >> 
    >> My 1972 Bowditch noted that Martelli's method was still popular. Having 
    been an active navigator then having tried it now, I can see why. There are 6 
    tables, but they are short and logical. In neither of the cases I tried did I 
    have to do an interpolation.
    >> 
    >> My one cavil is to wish M had set out the formulas he used. I have the same 
    gripe about the Concise SR table in the NA. 
    >> 
    >> Net of everything, though, Martelli's book is an agreeable stocking stuffer for myself.
    >> 
    >> Hewitt
    >> 
    >> 
    >> Sent from my iPad
    >> 
    > 
    > 
    > 
    
    
    
    

       
    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