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
CYA - MP-2 - Military Coordinate Scale and Protractor
DURABLE - Thick plastic material that very strong, waterproof, never yellow with age and built-in numbers never rub off. MULTI PURPOSE - Used with the
CYA Military Map Protractor for Land Navigation, Built-in Numbers not Fade, 6 RA
Gazechimp Straight Ruler Maptool 1:62500 Clear Protractor 1:24,000 Scale Accurate Learning for Utm, USNG, Mgrs Coordinates Map Reading Land Navigation, MSR : Office Products
CYA Military Protractor, Semicircle Map Protractor for Land Navigation, Built-in Numbers not Fade, 9 RA : : Office Products
Douglas 5 Inch Protractor Graduated in Degrees for Turkey
MTT PL Military-Protractor-11720 Made to NSN 6675-00-266-6880 is a Pocket Sized Land Navigation map Tool Including a Degrees Protractor
MTT PL Military-Protractor-11720 Made to NSN 6675-00-266-6880 is a Pocket Sized Land Navigation map Tool Including a Degrees Protractor inches Ruler
CYA Military Protractor, Semicircle Map Protractor for Land Navigation, Built-in Numbers not Fade, 9 RA : Buy Online at Best Price in KSA - Souq is now : Office Products
Map Protractor
Military Map Protractor
Gazechimp Straight Ruler Maptool 1:62500 Clear Protractor 1:24,000 Scale Accurate Learning for Utm, USNG, Mgrs Coordinates Map Reading Land Navigation, MSR : Office Products
50 COORDINATE SCALE MAP PROTRACTOR GTA: Mil Tactical