Silva Expedition 55

Probably the most resourceful compass in the world for artillery; target acquisition and command posts. The 55 is a unique compass featuring both an optical precision sighting system and a SILVA 1-2-3 SYSTEM Compass in the same unit, giving unbeatable precision and versatility in the field.

Bearings can be taken with accuracy to within half a degree. The compass has a luminous graduation ring and markings for compass reading in the dark. Once activated by daylight/flashlight it will give light up to 4 hours of light. 6400 mils on the graduation ring and 6400 mils + 360 degrees on the sighting scale.

Accuracy :± 0,5° (8.9 mils)

Altitude use: 5000m @-15 °C
Clinometer: No
Declination adjustment: No
Graduation: 6400° / 360°
Illumination: 4 hours after activation in light
Impact resistance: 30g in XYZ directions and free fall from 1.5 m height into gravel
Magnifying lens: Yes
Material: Acrylic
Patented red/black N/S lines in capsule: Yes
Resolution degrees / mils: Outer ring: – / 50 Precision sighting scale: 1 / 20
Scales :Baseplate: 1:25k, 1:40k, 1:50k, mm, inch
Settling time from 90° angle to complete rest    
6 sec
Settling time from 90° angle within ± 3°: 4 sec
Sighting System: Prismatic precision
Silicon friction feet: Yes
Size: 126 x 60 x 16 mm
Temperature operating range: -30 to +60 C
Type of compass: Baseplate, Lensatic precision sighting compass, Silva 1-2-3 System Mirror sighting compass
UTM position plotting scales (Romer scales): 1:25k, 1:40k, 1:50k
Variant: Magnetic Equator, Magnetic North, Magnetic South
Water resistance: Waterproof
Weight: 39g