Silva Expedition S Compass
Features
- Mirror sighting with sighting hole for accurate bearings, mirror-sighting function is perfect when determining direction over longer distances
- Clinometer
- Slope card: Measure avalanche risk, slopes and extra distance; determine how challenging your journey will be
- Detachable safety-release distance lanyard with 2 scales, soft and bendable, easy to place directly on to your route on the map
- Map measuring scales: mm, inch, GPS scales 1:24, 1:25, 1:40 and 1:50
- Rotatable housing: use with the SILVA 1-2-3 System®
- Magnifying lens for precision map work
- DryFlex™ Rubber grip for easy handling and great friction against the map
- Built in permanent adjuster for magnetic declination
- Luminous markings that enables night navigation
- Contrasting graphics: distinct colours make it easier to read the direction
- Robust material that withstands tough treatment and conditions
- For advanced users and professionals
- Manual (PDF opens in new tab)
Specifications
| Average Weight | 86g |
|---|---|
| Technologies | The Silva 1-2-3 System The easiest way to set a course towards the lake is with a simple and safe system used by expeditions, youth organisations, mountain guides, armies, orienteers and other navigators the world over: the Silva 1-2-3 System®
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. Magnetic declination and how to compensate for it. The difference, between Geographic North (North/South map meridians) and Magnetic North (where the North end of the compass needle points), is called declination. The amount and direction of declination is shown on the map. For example, 20 degrees. For Easterly declination, adjust as follows: With the declination scale inside the capsule (Field, Ranger, etc.) turn yourself until the North end of the compass needle points to 20 degrees on the ”E. decl.” scale. Now, the direction of travel arrow is pointing in the correct direction. With compasses that have a declination adjustment, simply use the screwdriver in the lanyard safety release to make the adjustment. Pull the safety release apart and use the screwdriver to turn the screw on the bezel until the bottom side of the North Arrow meets the 20 degrees Eastern declination scale. Remember to use the North/South lines at the bottom of the bezel and NOT the North Arrow as map North reference lines when taking the bearing on the map. |
