Silva Silva 55 6400-360 Military Magnetic North Compass  £110.00

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Clear / MN: For Use In Zone 1
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Silva Expedition 55 - 6400/360 Military Compass For Advanced Outdoor Use - Magnetic North Balanced

The Expedition 55 - 6400/360 Militaire is probably the most resourceful compass in the world for artillery; target acquisition and command posts.

The Expedition 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.



  • Military Compass
  • Specifically designed for use by defense forces
  • Graduated in milimeters and degrees (6400/360)
  • Classic full-size base plate
  • Luminous compound activated by torch or flashlight
  • Luminous for four hours
  • Declination adjustment: Declination scale inside capsule
  • Scales: mm / inch
  • Romer scales (1:25k, 1:40k, 1:50k)
  • Magnifying glass
  • Rubber feet
  • 6400/360 graduation scale
  • Red and black numbers
  • For defense forces / advanced users and rescue workers.

Technical Features:

  • Article number: 37586
  • Product Familiy: Expedition Military Compass
  • Type of compass: Silva 1-2-3 System Baseplate, Lensatic precision sighting compass
  • Suitability: Defense Forces / Advanced outdoor enthusiasts / Rescue workers
  • Accuracy: ± 0,5° (8.9 mils)
  • Resolution: 2 degrees / 50 mils
  • Altitude use: 5000m @ -15°C  /  5°F
  • 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
  • Luminous compound: Tritium compound 80 mCi
  • Magnifying lens: Yes
  • Material: Acrylic
  • Patented red/black N/S lines in capsule: Yes
  • Sapphire jewel bearing for friction-free movement of the compass needle: Yes
  • Resolution degrees / mils - Outer ring: – / 50 Precision sighting scale: 1 / 20Scales: 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
  • Temperature operating range:  -30° to +60°C  /  86° to 140°F
  • UTM position plotting scales (Romer scales): 1:25k, 1:40k, 1:50k
  • Water resistance: Waterproof
  • Variant: Magnetic North (MN)
  • Dimensions: 126 x 60 x 16 mm / 4.96 x 2.36 x 0.63 in
  • Weight: 36g / 1.37oz

Silva Quality: The Silva quality ensures durability and excellent readability; the baseplate compass is made from clear and scratch resistant acrylic. The Expedition 55 6400/360 features an impact resistance of 30g in XYZ directions and free fall from 1.5 m height into gravel

Silva 1-2-3 System:

  1. Place your compass on the map and use the baseline to make a straight line between your current position and your destination. Make sure Direction of Travel arrow points towards your destination.
  2. Turn the compass housing until the red part of the north/south arrow is parallel with the map meridians and points north on the map.
  3. Lift your compass from the map and hold it horizontally in your hand. Turn yourself and the compass until the red end of the needle is inside the red north/ south arrow. Now the direction of travel arrow will point towards your destination. Take a landmark and start moving. Enjoy!
  4. NOTE: If using a mirror-sighting compass: angle the mirror/lid approximately 45 degrees towards yourself and hold with straight arm out in front of you. Now, while looking in the mirror to see that the needle aligns with the red/black N/S arrow, sight above the mirror (using the sight) towards an object in the field in line with the direction of travel

Learn About Silva Balacing Zones: The Earth and its magnetic zones work in mysterious ways, and to navigate accurately you need to make sure you have a compass for the place where you are at the moment. Different compasses work for different parts of the world. Hence be aware if you plan for an adventure on the other side of the world! There are three different balancing zones for compasses: Magnetic Equator (ME), Magnetic North (MN) and Magnetic South (MS). However, at Silva we also have global compasses that works in any magnetic zone.