Silva 54B 6400-6400/360 MILITARY COMPASS

The Silva Expedition 54B 6400-6400/360 Military Compass is the top of the range in hand-held military compasses.

The Expedition 54 is a unique compass featuring graduations in Mils*, 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 – 6400 mils on the graduation ring and 6400 mils and 360 degrees on the sighting scale.

The Silva Expedition 54B 6400-6400/360 Military Compass features Beta illumination which lasts for 7.5 years and does not require light activation, whereas the other Silva military compasses have a light activated luminous compound which illuminates up to 4 hours.

Features & Specifications:

• MS – optimised for magnetic south zone (Australia & New Zealand)
• Special “Beta Illumination” illuminates for 7.5 years after activated
• Luminous compound:  Tritium compound 80 mCi
• Available graduations: 6400/360
• Resolution degrees / mils: Outer ring: 2 / 50
• Precision sighting scale: 1 / 20
• Measuring scales on base plate: 1:25k, 1:50k, 1:40k, mm, inch
• UTM position plotting scales (Romer scales): 1:25k, 1:50k, 1:40k
• Settling time from 90 degree angle within +/- 3 deg: 4 sec
• Settling time from 90 degree angle to complete rest: 6 sec
• Accuracy: +/- 0,5 degree (8,9 mils)
• Waterproof: IP68 – (10 m)
• Altitude use: 5000m@-15 C I
• 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): 126x60x16
• Weight: 39 grams

*MILLIRADIANS (Mils)

A milliradian (mil) is an SI derived unit for angular measurement, defined as a thousandth of a radian (0.001 radian).
Compasses graduated in Milliradians are generally used where very small angles are necessary for very accurate calculation of proportions, size and distance of a target, for example for rifle and short distance artillery purposes.
A military compass is generally not suited for standard navigation for hikers, orienteers etc. where degrees are used to navigate.