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NAVIGATION-L

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The Navigation-L mail list dedicated to the discussion of the use and history of non-electronic navigation. This includes Pilotage, Dead-Reckoning, and Celestial Navigation using traditional techniques and instruments.

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SILICON SEA
Silicon Sea is a series of small boat navigation problems in the form of a circumnavigation. Each problem, called a Leg, is complete to itself, There is no need to have worked previous Legs to participate. But being subscribed to Navigation-L is a great help. The navigation cruise started in Mallorca, Spain, transited the Red Sea, crossed the Indian Ocean, Southern Ocean and stopped in Sydney, Australia. Then to Auckland, New Zealand, around Cape Horn up to Bridgetown, Barbados. transited the Panama Canal and took the sailing route to Hawaii. It has left Hawaii and is now bound for San Pedro, California, Silicon Sea's homeport.

The Silicon Sea navigation Legs are archived in the files as ssea.zip with an answers file included. The latest Leg in the archive is Leg 83.

LINKS
Follow this link for Ed Falks's example of working a Silicon Sea Leg Problem. .

Go to Hemming Umland's page for a terrific and concise, A Short Guide to Celestial Navigation ,with additional navigation links and free programs.

Go to Arthur Pearson's Lunar Distance Web Page. A resource and guide to Celestial Navigation using the Lunar Distance method. With additional navigation links and information.

Visit the Webmistress's site of celestial navigation history, theory, books and links. At the Celestial Navigation Net

Join the Foundation For The Promotion Of The Art Of Navigation and receive their quarterly, "The Navigators's Newsletter", which is full of the history of navigation and technical articles, plus discounts on navigation charts and books.

For an online tutorial on navigation and the mathematics involved visit the Navigation Trigonometry page. It is a short review of spherical trigonometry, celestial navigation, and great circle sailing. With methods that can be used on a calculator without the need of special tables.

To use complete online navigation calculation programs go to Marine Navigation Calculator. This site is maintained by NIMA, it is a plethora of all types of navigation calculators.

The current complete NIMA online edition of PUB NO 9, 2002 Edition, Bowditch. in .PDF format is available for free download.

The New Radar Navigation and maneuvering Board Manual (pub. 1310), available in .PDF format from the NIMA web page.

NAV-L FILES
To download any of the following files click on the highlighted title.

4mulas.zip -- A pair of files with valuable Celestial Navigation and Dead Reckoning formulas and information.

celnav.zip -- A PDF file of the Coast Guard Celestial Navigation training guide. An 171 page manual, and a 10.6 Mb file.

dma5090.zip -- A JPG file of the now out of print DMA Maneuvering Board Plotting sheet. Also see Pub. 217 below.

geomag.zip -- is a magnetic variation determination program. No instructions are available. The file was furnished by USGS.

The original files for The maneuvering Board DMA5090 Instruction Manual, pub. 217,is available for download in 4 .zip files.
The Front Cover Page
The Table of Contents
The Manual Text (10.9 MB file)
The Index

nautical.zip -- An Astro Navigation program complete with built in almanac from 1950-2050. Includes a Time/Distance table combined with Mid-Latitude Sailing. Has star and world ports graphics.

Navigator -- A shareware program with Sight Reduction, LOP, Fix, Nautical Almanac, Starfinder and Windows graphic plotting and raster chart making capabilities. A really complete computer navigation program by Omar F. Reis.

posplot.zip -- A program that generates and prints plotting sheets for your selected latitude (8.5 x 11 inches).

sscharts.zip -- Plotting Sheet size chartletts used in the first 60 Legs of the Silicon Sea cruise.

ssea.zip -- The current archive of the Silicon Sea navigation cruise problems.

tvmdc.zip -- A freeware program to correct true course for Variation and Deviation.

ups.zip -- A free PDF Universal plotting sheet in 8.5" x 11" format courtesy of Thomas Reed Publishing.

mb11x17.zip -- A free PDF maneuvering board form without the nomographs in 11" x 17" format, courtesy of Mike Wescott.

mb8x11.zip -- A free PDF maneuvering board form without the nomographs in 8.5" x 11" format, courtesy of Mike Wescott.

85x11.zip -- A free file of the maneuvering board DMA 5090 work form (green print)reduced to 8 1/2" x 11.0" .jpg format. It has the nomographs of the original DMA 5090 form.

NASRform.zip -- A free PDF work form for the Nautical Almanac Sight Reduction Table. 4 tables per sheet, in 8.5" x 11" format, courtesy of Mike Wescott.

Page Updated: 9/24/2006

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