Here's what other sites are saying:
Master-crafted by the machinists and minds at Brunton's world headquarters and tested in the mountains and mesas that surround Wyoming. Features the O.S.S. alignment system, tool free declination adjustment, on the map meridian lines and more. Dimensions: 2.9" x 4.2" x 0.6". Wt: 1.8 oz.
- Mountains Plus
Brunton O.S.S. 30B Compass FEATURES of the Brunton O.S.S. 30B Compass Brunton O.S.S. alignment system Tool free declination adjustment On the map Meridian lines 2 degree resolution Extra long straight edge Map Magnifier Inch/mm scales Interchangeable scale cards Lanyard Interchangeable scale cards SPECIFICATIONS of the Brunton O.S.S. 30B Compass Weight: 1.8 oz Dimension: 2.9 x 4.2 x 0.6in. Resolution: 2Adeg Accuracy: in.+/-in. 2Adeg Ruler Scales: inch/mm Circle on Circle System: Yes Declination Adjustment: Tool-free On the Map Meridian Lines: Yes Map Magnifier: Yes
Crafted by the master machinists and minds at Brunton and tested in the mountains and mesas surrounding their headquarters, the Brunton O.S.S. 30B Compass delivers precision navigation, simplified.
The Brunton O.S.S. 30B compass stirs the pot on compass design with innovations such as tool-free declination and circle-over-circle alignment. Its clean design is straightforward and user-friendly. Orbital navigation helps eliminate confusion by using a single color and reducing parallax. Tool-free declination adjustment allows easy reading and convenient navigating. Transparent baseplate makes it easy to navigate with a map. The Brunton O.S.S. 30B compass features an extra-long straight edge, 2deg resolution, a lanyard and scales in both inches and millimeters.
Brunton's O.S.S. 30B Baseplate Compass features (Orbital Sighting System) technology that sets a new standard for precision and accuracy while retaining ease of use. The long straight edge lets you easily draw navigation lines on your map and the magnifier and interchangeable scale cards- all help you stay on course. Meridian lines at map level aid orientation with a map and minimize distortion.BRUNTON O.S.S. alignment systemTool free declination adjustment shows the difference between magnetic and true north~ so you can get the most accurate readingsMeridian lines at map level aid orientation with a map and minimize distortion2 degree resolutionExtra long straight edge lets you easily draw navigation lines on your mapMap Magnifier Inch/mm scales Interchangeable scale cardsLanyard Size: 2.9?x4.2?x0.6? Weight: 1.8 oz.
Brunton 10B Baseplate Compass
Brunton 20B Baseplate Compass
Brunton 9050 Compass
Brunton Classic Compass
Brunton Digital Compass
Brunton Gentleman's Compass
Brunton O.S.S. 40B Compass
Brunton TruArc 5