Military
The Silva Expedition 4 - Military is a classic "full-size" base plate compass for experienced navigators. This one measures in mils.
Luminous
Used by different defense forces around the world. 1:25k, 1:50k, 1:63.36k, mm and inch map measuring scales. Luminous points for navigation in the dark.
This compass is measured in mils.
	- Silva 1-2-3 System baseplate compass
 
	- Compass capsule / needle
 
	- Magnifying lens - Yes
 
	- Declination adjustment: Decl scale in capsule
 
	- Active time after activation in light: 4 hours (luminous compound - Tritium compound 80 mCi)
 
	- Silicon friction feet
 
	- Patented red/black N/S lines in capsule
 
	- Available graduations: 6400/360 (360 inside the capsule), 6300, 360
 
	- Resolution degrees/mils: 2 / 50
 
	- Measuring scales on base plate in mm, inch
 
	- UTM position plotting scales (Romer scales): 1:25k, 1:50k, 1:40k
 
	- Settling time from 90 degree angle within +/- 3 deg: 2.7 sec
 
	- Settling time from 90 degree angle to complete rest: 5 sec
 
	- Accuracy: +/- 1 degree (17.8 mils)
 
	- Waterproof: IP68 - (more than 100 m)
 
	- 
Altitude use: 5000m@-15 C
 
	- Impact resistance: 30g in XYZ directions and free fall from 1,5 m height into gravel
 
	- Temperature operating range: -40 to +60 C
 
	- Material: Acrylic
 
	- Size (mm): 126 x 60 x 10
 
	- Weight: 36g