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: Just getting started
    From: Lu Abel
    Date: 2007 Jan 19, 19:32 -0800

    One really great page Gary omitted:   You can check your Hc calculations
    against the US Naval Observatory's idea of what they ought to be.  Plug
    in a DR L/Lo and time of observation, and it gives Hc and Zn for all
    visible bodies!
    
    http://aa.usno.navy.mil/data/docs/celnavtable.html
    
    Lu Abel
    
    Gary J. LaPook wrote:
    >
    > Gary LaPook wrote:
    >
    > There are many web sites that have information available on navigation.
    > You can access Bowditch On Line free at:
    >
    >
    > http://www.i-DEADLINK-com/bowditch/
    >
    >
    > you will soon learn that "Bowditch" (The American Practical Navigator
    > published by the US Navy Hydrographic Office (H.O.)  as publication
    > number 9; H.O. number 9) is the standard reference work on this subject.
    >
    >
    >
    > You can access, for free, an online version of the Nautical Almanac at:
    >
    > http://www.tecepe.com.br/scripts/AlmanacPagesISAPI.isa
    >
    > unfortunately it doesn't include the increments pages from the N.A.
    > which are needed. However, if you get your hands on an old copy of the
    > N.A. you can use its increments tables because they do not change from
    > year to year.
    >
    > You can also download. for free, a program that does the celestial
    > computations for you which is handy when making many practice shots and
    > also for checking your work when doing the computations by hand:
    >
    > http://www.tecepe.com.br/nav/default.htm
    >
    >
    > For tables either H.O 249 or H.O. 229 or H.O. 214 are all very similar
    > and 249 is the most convenient but only has a precision of one minute of
    > arc which is an accuracy on one nautical mile which is realistic on a
    > small boat. If you want higher precision, especially for practice shots
    > while on shore, then 229 or 214 will do.  214 is out of print but I
    > think its arrangements of the tables is more convenient than in 229.
    >
    > BTW, does anybody know why they switched from the 214 format to the 229
    > format so you cant just do a round of sight using only one page as you
    > could do with 214 but have to chase all over for the LHAs?
    >
    > If you want a short tabular method H.O. 208 is my preference.
    >
    > You can find many of these books on ebay.
    >
    >
    > >
    >
    
    --~--~---------~--~----~------------~-------~--~----~
    To post to this group, send email to NavList@fer3.com
    To unsubscribe, send email to NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    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