Silva Arc Jet OMC Thumb Compass

In orienteering, every second lost waiting for a compass needle to settle can cost you the race. The Silva Arc Jet OMC Thumb Compass eliminates that delay with Jet Needle technology, locking onto north almost instantly for rapid direction changes. Its integrated Optimal Magnifier Compact (OMC) enlarges fine map details, while the ergonomic thumb design keeps map and compass aligned with your hand movements for seamless navigation.

Who is it for

This left-hand version is tailored for right-handed orienteers who wear the compass on their left hand, leaving the right hand free for punching, drawing routes, or steadying the map. Ideal for competitive forest orienteering, urban sprint events, and demanding terrain where speed and precision are critical.

Main features

• Silva Jet Needle technology for rock-solid, rapid direction setting
• Integrated Optimal Magnifier Compact (OMC) enlarges map symbols for precise reading
• Three map scales (1:15 000, 1:10 000, 1:7 500) cover all orienteering disciplines
• Full 360° scale with high-contrast graphics for quick bearings
• Sturdy transparent baseplate with rubber friction feet prevents slipping on the map
• Detachable elastic thumb strap holds the compass firmly yet comfortably
• Lightweight and durable construction, built for demanding terrain

Specifications

• Compass type: Thumb compass
• Needle technology: Silva Jet Needle, liquid-filled
• Magnifier: Integrated Optimal Magnifier Compact (OMC)
• Scales: 1:15 000, 1:10 000, 1:7 500
• Graduation: 360 degrees
• Baseplate material: Durable transparent plastic
• Map grip: Rubber friction feet
• Attachment: Detachable elastic thumb strap
• Visibility: High-contrast graphics
• Hand orientation: Left-hand version (for right-handed users)
• Declination adjustment: Fixed (no manual adjustment)
• Luminescence: No
• Water resistance: Splash-proof
• Operating temperature: -20°C to +60°C

Tips

For best results, attach the compass to your left thumb and keep the baseplate flat on the map. Use the OMC magnifier to check control descriptions and fine contour lines without losing pace. After use in wet conditions, wipe the compass dry to maintain clarity of the baseplate and magnifier.