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A free celestial navigation book unlike any other, including lunar
distance equations. This book is dedicated to removing the cloak of
mystery; to teach the concepts, some interesting history, the
techniques, and computational methods using the simple pocket
scientific calculator. And yes, also how to build your own navigational
tools. It also has condensed S-tables and work sheets for when you have
no calculators available.
Book: Celestial Navigation in a Teacup
new revision 11/27/2014
(added method of haversines to the Special Topics chapter)
Why I wrote this book...
Growing up, I had always been fascinated by the thought of navigating
by the stars. However, it instinctively seemed to me an art beyond my
total understanding. Why, I don't know other than celestial navigation
has always had a shroud of mystery surrounding it (no doubt to keep the
hands from mutiny). Anyway, I love to know the how & why of things,
so this book is the result. What I discovered was that it was based on
concepts and geometry that was so simple, you have to slap yourself on
the forehead and say "Why didn't I think of that myself?"! This book
will show you why. Click on
the link below to download the pdf book.
If you wish to acquire a hard copy of this book, you can purchase it at
Lulu.com. It is published as a paperback. Click
this link to get the book at Lulu
My collection so far...
to download the booklet "Building the Farley Octant"
Click here to download the pdf and cad
drawing plans for the Farley Octant
TeacupNav/TeacupCelestial CN full suite
Comprehensive FREE Celestial Navigation Software for Windows OS. This
will run in Ubuntu (Linux) when "Wine" software is also installed. The
same for a Mac when the Mac version of Wine is used. Just do the normal
set up as you would in Windows. An icon is inserted in the installed
TeacupCelestial, also called TeacupNav, from Teacup Navigation. Sight planning, built-in perpetual
almanac, sight reduction with plotted LOPs and global COPs. Rise/set
times, and Lunars are also part of this program along with many utility
Click here to download software
Click here to download
here to download a simple Excel file Celestial Worksheet It
will allow 6 simultaneous observations to be recorded and reduced, but
you still need the hourly GHA and declination from the nautical almanac.
A note of confusion concerning
the Settings: the General Settings form has a note on it saying you
have to go to the Sight Planner form to make changes to the Time
Zone. After which you fill out your Lat, Lon, and then press the
bar that says “Remember these settings as my default”. That
should save a settings file (TeacupNav.nv1) in the same location as the
folder where the executable is (TeacupCelestial32.exe). If you
are in Europe then the data files will not be written correctly; see
I have gotten responses that upon initial installation and first usage some people get the error note "Problem reading settings file".
This is usually an indication that you are using European formatting of
decimals as a comma (,) instead of the USA typical of a period
(.). For those of you in Europe, a Swedish user discovered the
making the software work correctly in Europe:
Quote: "In the control panels national localization, I changed the the
sign to a period from the comma and changed the thousands delimiter to
a comma from a period. This is all that that needs to be done to
get the program to work perfectly and Windows is still in Swedish with
the correct keyboard."
Or follow these diagrams for Windows 7:
If you have suggestions for improvements, some functionality you would
like to see incorporated, then please email me using the address on the
1st page or in my software help menu!
Version 3.2h, Nov 28, 2014 (works well on netbooks too). Even
though I originally called this Teacup Celestial, people call it
TeacupNav when they contact me, so I now call it that as well!
This freeware program I authored in VisualBasic 5 for Windows is the
result of years of effort. Simple, intuitive, easy to use, flexible,
and very accurate ephemerides. This is a complete and seamless
celestial navigation package. You must try out this program, especially
with the new changes!!! (version 2.0 was a major change)
ver 1.0 original, no lunars or rise/set
ver 1.1 rise/set included
ver 1.2 lunars included
ver 1.3 rise/set corrected for "clock math" errors
ver 1.4 got rid of the clock math all together!
ver 1.5 lunars have files that can be saved
ver 1.6 fixed bug in lunars, and I have made it "push-button"
ver 1.7 added arc distance function to Sight Planner
ver 1.8 added ecliptic plane on Sight Planner
ver 2.0 simpler interface with almanac facsimile removed, and a tide
and leeway calculator added
ver 2.1 added a utility calculator for plane sailing, calculated
altitude, and calculated longitude for the Sumner Line method.
ver 2.2 added in the calculator utility distance to the horizon, and
dip when using a land reference horizon.
ver 2.3 added function in dip calculator to give the additional
correction (above&beyond normal horizon dip)for using land as the
horizon. 2.3a corrected a small inconvenience in the Tide set/ True
ver 2.4 added separate rise/set time form, and fixed some minor tabbing
ver 2.5 fixed a bug in the ephemeris generator that affected long term
accuracy 0.1' per 200 years
ver 2.6 added a default file for the sight planner tool to remember
your personal settings
ver 2.7 added some helpful error messages
ver 2.7 netbook: reformatted some forms so that all will show in a
ver 2.8 allows Venus to be tracked on the sight planner during the day
ver 2.9 has a simplified sight reduction form for single shots, found
under Calculators. This is good for training where there is more of a
manual feel to what you are doing. Also included a date and time
loading button to load other forms with the date and time on the main
ver 3.0c includes the 3-point resection calculations for coastal
navigation, to be found under the Calculators. Made some format
changes. The fix graph and Sight Planner graphs can now be
resized by grabbing lower right corner and refreshing .
ver 3.2a Made improvements to the 3-point protractor (resection),
and added a global circles of position visualizer! Rise/set times
improved for upper limb of sun on visual horizon.
ver 3.2d made resizing of Sight Planner and LOP plot smoother.
Fixed viewing problem in Plane Sailing Calculator.
ver 3.2e LOPs are now identified with labels in both the LOP plot and
the global COP view.
ver 3.2f Minor improvements.
ver 3.2g Superficial changes
ver 3.2h Fixed a problem I created in 3.2g
A friend of mine from the USPS Offshore Navigation Committee has created celestial navigation tools too. It should
be a valuable addition to any navigator's tool box!
Click here to visit the Celestial Tools web site
ALL THESE RESOURCES ARE FOR
EDUCATIONAL USES ONLY! ALL
Home | Celestial
| Radio Control Aircraft | Interesting
Stuff <<< Click on these
links to the left to navigate to the different pages!