Metallic liquid filled prismatic compass - military model

Often used in connection with maps. Lightweight and rugged aluminium alloy construction

Has a foldable metal lid for easy storage and transport. With a glass window sighting line etched on the lid

Sapphire bearing for ensuring quick movement, years of dependability, and optimal precision. Prismatic readings avoid errors caused by mirror readings and potential parallax

360° rotatable bezel ring with scale for easy reading. Liquid-filled prevents excessive oscillation of the magnet needle. The liquid is extremely stable even exposed to extreme changes of temperature and air pressure. Reference table at bottom of base for estimating distance and angle of slope