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Portney's Ponderables: Brain Teasers for Navigators

"Navigation puzzles, controversies, historical problems, and other ponderables demystified by an expert navigator and writer. Joe Portney is a US Naval Academy graduate and Air Force navigator who has participated in three historic flights over the North...

How to Use Plastic Sextants

Sextants are used to measure angular heights of celestial bodies above the horizon to find the latitude and longitude of the observer. They can also be used on land with artificial horizons. Sextants can also be used to find the correct Universal Time by...

Stark Tables for Clearing the Lunar Distance

Celestial navigation is a way to find your latitude and longitude on earth using a sextant to measure the angular heights of celestial bodies above the horizon. It has been used by mariners at sea and explorers on land for three hundred years, and it is...

Barometer Handbook

With the exception of trained meteorological crews, barometers in the past were used at sea primarily to learn if the pressure was going up or down, and whether it was doing this rapidly or slowly. And from this we made an educated guess of a likely...

Tidal Currents of Puget Sound

This Book compliles Current Charts and Tide Prints for Puget Sound. Current Charts show the values of the currents at each reference station. There is one chart for every hour throughout the cycle. They are indexed to the tidal current at Admiralty Inlet...

Long Term Almanac 2000-2050

The ideal one-book navigation back-up for experienced navigators. Includes almanac data for sun and stars, valid until 2050. Also has Sight Reduction Tables and Altitude Correction Tables. An essential back-up for serious celestial navigation.

Marine Weather WORKBOOK

This workbook is intended to supplement the text Modern Marine Weather with practice questions and convenient resources. All answers are provided. The Lesson structure here matches the chapter structure in the textbook. There are multiple choice...

500 Days

The author departed Brisbane, Australia in June 1984 in his 12 ft. self-designed and built boat to complete a circumnavigation in the smallest yacht yet. An amazing story. Photos.

Bigfoot Santa ORNAMENT

Bigfoot wears a Santa hat. Laser-cut aluminum. Made in USA.

Dungeness Crab ORNAMENT

LIMITED TO STOCK ON HANDLaser-cut aluminum with a light finish. Made in USA. Folds out to become a 3-D ornament. Ships flat and you bend. Includes spinner and hook.

Hummingbird ORNAMENT

LIMITED TO STOCK ON HANDLaser-cut aluminum with a light finish. Made in USA. Folds out to become a 3-D ornament. Ships flat and you bend. Includes spinner and hook.

Sea Trails Map: Half Moon Bay to Santa Cruz

Sea Trails Maps are designed for kayakers, paddlers and other boaters. Waterproof maps.