The only known BACK-UP of the GPS when it malfunctions is your ability to use a military protractor and military compass. The RM Military Protractor is the only protractor with a printed formula and a diagram to align map grid north to match the compass magnetic north. Protractors without the conversion formula will provide a reading that is off the exact grid coordinate position. The GPS will not penetrate sandstorms rainstorms snowstorms smoke structures forest canopies and thick cloud cover.
RM Products Military Round Protractor
How to use a Military Protractor for Land Navigation
RM PRODUCTS Military Triangle Scale Protractor. US MIL Map protractor/navigation aid., New old stock- with some shelfwear-scuffs and small scrapes on
Military Triangular Protractor Scale
MAP COORDINATE SCALE and Protractor, Graphic Training Aid for work with maps £4.89 - PicClick UK
Topographical Map Scale Set, UTM MGRS Military Map Protractor and
MapTools Product -- Military Style UTM/MGRS Coordinate Scale
RM PRODUCTS Military Triangle Protractor : Industrial & Scientific
Military Triangle Protractor
The only known BACK-UP of the GPS when it malfunctions is your ability to use a military protractor and military compass. The RM Military Protractor is the only protractor with a printed formula and a diagram to align map grid north to match the compass magnetic north. Protractors without the conversion formula will provide a reading that is off the exact grid coordinate position. The GPS will not penetrate sandstorms rainstorms snowstorms smoke structures forest canopies and thick cloud cover.
RM Products Military Square Protractor
Vietnam Era Rifle Bore Cleaner 8oz - Omahas Army Navy Surplus