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: HO 203 & 204 revisited
    From: Henry Halboth
    Date: 2015 Nov 13, 12:11 -0500
    Hi Brad,
     
    Thanks for the response to my posting.

    I did not use HO 203 0r 204 at sea. As a matter of fact i never saw a copy thereof aboard an American Ship, Merchant Marine or Navy - my only  prior exposure to thrse pubs had been through classroom work which utilized the 1934 edition of Dutton as a textbook. The sights  posted were reworked from those originally done utilizing HO 214 and the Air Almanac.

    Thanks also for the attached corrections, additions and errata, however, none seem to correct the errors I spoke of, nor do they mitigate the lengthy and overly technical explanation of usage - I believe that had these tables been published utilizing d/m/s and broken up into a number of volumes, as was later done with HO 214, they would have found far greater acceptance.

    On the subject of short tabular methods generally - there have been so many produced hat it is difficult to provide an all inclusive list; Not counting the various Lunar Distance tabular methods, I believe the following at l east may have been missed.

    Longitude by Chronometer, 1849 -by James Gordon
    Altitude, Azimuth & LOP, 1918 - USHO
    Altitude & Azmuth Tables for LOP  about 1914, by Radler de Aquino, BN
    Altitude tables, 1907, by Frederick Ball
     etc, etc

    Best regards,

    Henry


    On Thu, Nov 12, 2015 at 1:11 PM, Brad Morris <NoReply_Morris@fer3.com> wrote:

    Hello Henry

    Did you use HO 203/204 in 1946 or have you reworked the problem using that data merely as an example? 

    There is an errata insert pasted into my 1923 HO203 volume which clearly corrects the errors found in the explanation (or to use the 1800's term...explication) of the tables.  I've attached the front piece of that insert, dated 1924.  So the errors were found quickly, within a year of first issue.

    The 1933 HO204 contains no such errata.

    There is yet another paper glued into the 1923 volume, "Additional Uses of HO 203", to wit: Star Identification as well as Determination of Morning and Evening Twilight.  Attached.

    Specifically referenced in the production of HO203 are the following works

    (1) Abrégé de Navigation, historique, théoretique, et pratique....  Jerome Lalande.  Paris 1793
    (2) Horary tables for finding the time by inspection, to facilitate the operations for obtaining the longitude at sea, by chronometers and lunar observations... Thomas Lynn.  London 1827
    (3) Azimuth tables showing the true bearing of the sun... Thomas Lynn. London 1829.

    Brad


    On Nov 11, 2015 5:21 PM, "Henry Halboth" <NoReply_Halboth@fer3.com> wrote:

    Sorry guys. I posted the wrong Noon Sight computation. The correct one attached.

    Henry



    Attached File:

    (ho-203-format-sun-ma.ods: Open and save or View online)

    View and reply to this message

    Attached File:

    (img/133522.img_20151112_111431.jpg: Open and save)

    Attached File:

    (img/133522.img_20151112_112113.jpg: Open and save)

    View and reply to this message


       
    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