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INSTRUCTION MANUAL
e Weems & Plath Company Story ...............................................
Getting Started .................................................................................
Box Contents .........................................................................
Care Instructions ...................................................................
Technical Specications .........................................................
Operating Instructions ....................................................................
Power Methods .....................................................................
Navigation Button Overview .................................................
Upper Screen Icon Description .............................................
Lower Screen Description .....................................................
Initial Setup ......................................................................................
Conguring Settings ..............................................................
Language ....................................................................
Time & Date .............................................................
Measurement Units ....................................................
Pressure ..........................................................
Altitude ..........................................................
Temperature ...................................................
Pressure ......................................................................
Altitude & Pressure Calibration .....................
Advanced Functions Conguration .......................................
Mode Button .............................................................
Backlighting, +1 Hour or -1 Hour, Dual,
Alarm Clock, Buzzer .....................................
Pressure Alarm Function ...........................................
Zoom Function .........................................................
History Function ........................................................
Installation ………….….....……..……..……………........…....….....
Warranty ...........................................................................................
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THE WEEMS & PLATH COMPANY STORY
In May of 1919, eight years before Lindbergh’s famous solo ight, three
small planes set out from Naval Air Station Rockaway,NY headed for Plymouth,
England in an attempt to make the rst trans-Atlantic ight. Only one of them
made it. Twenty-ve hundred feet below on board a station tracking ship, a
young navigator, Lt. Cdr. Philip Van Horn Weems, U.S. Navy, gazed up and
thought there must be a safer and simpler way than using a small armada of
ships as beacons for the ight.
For centuries, man had relied on the heavens, circling planets and the
constant horizon to guide him in his travels. An accurate clock, compass,
sextant and charts were the necessary tools for plotting a course. But these
tools required time for computations and a place to spread out and study the
charts which meant celestial navigation was ill suited for the cockpit. Lt. Cdr.
Weems, a brilliant, inventive and determined young man knew as he tracked
that rst ight that modern navigation needed to change, and he went on to
revolutionize the eld with his ideas, writings and inventions.
e challenge he undertook was complex and involved the invention of
new methods and tools. Weems went on to develop a new kind of sextant and
the Second Setting Watch with its inner rotating dial. He also produced the
famous Weems Plotter, a more precise and easier to use plotting tool, which is
still one of our most popular plotters.
Weems continued to improve the instruments and broaden the applications
of his methods, including radio astronomy, polar exploration and space
navigation. He published numerous articles, taught navigation at the U.S.
Naval Academy, and established his own school in Annapolis to teach e
Weems System of Navigation. Charles Lindbergh studied with Weems before
attempting his trans-Atlantic ight and Admiral Byrd, a classmate of Weems
at the Naval Academy, came to Weems for instruction before setting out for
the North Pole.
A century earlier, Carl Plath’s company in Hamburg, Germany - C.
Plath, had been manufacturing the nest commercial sextants and magnetic
compasses available, including the rst gyrocompass installed on a commercial
vessel in 1913. It was a natural development for Weems’ company to become
the North American source for C. Plath’s ne instruments; hence the alliance
of two distinguished names - Weems & Plath. e exceptional workmanship
that both Philip Van Horn Weems and Carl Plath required in developing the
manufacturing of precision navigation tools remains at the heart of all our
products.
Weems & Plath is still located in the Chesapeake Bay town of Annapolis
where it began over 90 years ago. We are committed to supplying the world
with the nest nautical products available while maintaining the high standards
of service that have distinguished Weems & Plath from its inception.
214 Eastern Ave. Annapolis, MD 21403 | phone 1.800.638.0428 | 410.263.6700 | www.weems-plath.com
