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This product is no longer available, but don't go just yet.


  • Orbital navigation uses a single color and reduces parallax; dual-pivoting mirror enables precise headings and is center-mounted to run with your direction of travel
  • Meridian insert preserves Brunton's patented, tool-free declination system and keeps meridian lines down on the map for easy and precise headings
  • Magnetized disc is more accurate than conventional needles and settles quickly for fast, accurate bearings
  • Antistatic, liquid-filled dial with jeweled bearing features 1° gradations to ensure accuracy; sighting mirror improves accuracy
  • Ergonomic rubber shoe on bottom grips map surface and is comfortable to hold
  • Declination adjustment scale allows you to account for the difference between magnetic and true north; scale on base is adjustable to your location
  • 3 clinometers measure slope angles for determining snow slope stability and surveying; 2 of the clinometer scales offer 5° increments and 1 offers 1° increments
  • USGS map scale of 1:24,000, Universal Transverse Mercator (UTM) and mile scales offer position accuracy
  • Waterproof field reference cards includes navigational, topographical and survival information that store in the compass
  • The Brunton O.S.S. 70M compass includes a built-in magnifier, protective, flip-down cover and lanyard

Made in USA.

View all Brunton Compasses

REI membership


Best Use Backpacking
Analog Or Digital Analog
Increments 1 degrees
Scale 1:24,000 Yes
Declination Adjustment Yes
Sighting Mirror Yes
Liquid-Filled Yes
Floats No
Luminous Points/Bezel No
Clinometer Yes
Ruler Yes
Magnifying Lens Yes
Lanyard Yes
Dimensions 4.1 x 2.5 x 1 inches
Declination Scale Yes
Weight 3.6 ounces

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