Brunton O.S.S. 40B Compass
Source: bought it new
The Brunton 40B compass is an excellent baseplate compass. It permits setting of declination without tools and this is an invaluable feature. It saves time and prevents mistakes in calculating bearings. The compass is accurate to one degree and the scale is easy to read. the grid coordinate scale is simple and accurate. Fits the hand comfortably. A very well designed instrument. i am not an orienteer, but use the compass for back country navigation and I rely on it.
- Well designed
- Well made
- I find no fault with it.
If you have been trained in the use of a baseplate compass, this is a very good one. It permits you to offset the dial for the local declination. In that way the map and compass are in agreement and there is no need for calculating the difference between grid or true North and Magnetic North. All azimuths that you measure on the map using the protractor function are directly readable as magnetic bearings without any calculation. A very useful, time saving and error eliminating feature.
I have tested this compass on courses that we have in our local parks against competitive compasses and this is the one to choose. Well made, easy to use, accurate; what more is there to say. Oh yes, it's made in USA, which was a great surprise! Nice going, you folks in Montana.
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Boasting Brunton's O.S.S. circle-over-circle alignment system for ease and accuracy, the 40B Adventure Race Compass also features UTM roamer scales and an extra-thick base plate to ensure strength on the course.
Key Features of the Brunton O.S.S. 40B Adventure Racing CompassBRUNTON O.S.S. alignment systemTool free declination adjustmentOn -the -map Meridian linesMagnified read-out for 1 accuracyReversible slide scale100m confident circlesWrist lanyardLatitude/Longitude/UTM map tool1-degree resolutionInch and mm scalesBrunton O.S.S. 40B Adventure Racing CompassImprove your navigating skills and reach your destination with ease using the multi-purpose Brunton O.S.S. 40B Adventure Racing Compass. Created in the USA by the brilliant minds at the Brunton headquarters, this compass has the best advanced functions in a simplified form that weighs 1.7 ounces. Its BRUNTON O.S.S. Alignment System displays clear readings on the compass without any complexity through the use of circle to circle alignment. The compass's twistable housing provides quick and easy adjustments without tools. Featuring on-the-map Meridian lines, you can use it to orient on maps without an extra device. It has a 1-degree resolution, making a more precise bearing and effective with its magnified readout. You can plot your course that you desire with its Reversible slide scale, with inch and millimeter scales for adaptability in measurements. A map magnifier is built into the compass to magnify those hard to read places on maps. Variously scaled 100m circles assure confidence when drawing points on maps. A Latitude/Longitude/UTM map tool lets you get the most out of your map with 1:24k, 1:25k, 1:50k, and UTM scales. Plus, it includes a wrist lanyard for orienteering in the wild. Versatile and durable for any navigating purpose, the Brunton O.S.S. 40B Adventure Racing Compass will always let you know where you are, where you've been, where you should go to reach your desired destination.
The Brunton 40B Adventure Racing Compass provides advanced orienteering features in a slimmed-down package. The Brunton O.S.S. alignment dishes out simple, reliable readings, while the latitude, longitude, and UTM roamer scales let you dig deeper into your navigation during races, training, or large-scale trekking.
Brunton O.S.S. 40B Adventure Racing Compass DECENT FEATURES of the Brunton O.S.S. 40B Adventure Racing Compass Brunton O.S.S. alignment system Tool free declination adjustment On the map Meridian lines Magnified read-out for 1 degree accuracy Reversible slide scale 100m confident circles Wrist lanyard Latitude/Longitude/UTM map tool 1 degree resolution Inch and mm scales UTM scales, confidence circles, extendable ruler The SPECS of the Brunton O.S.S. 40B Adventure Racing Compass Weight: 1.7 oz Map scales: 1:24k, 1:25k, 1:50k, UTM Roamer scales: 1:24k, 1:25k, 1:50k Overall Dimension: 5.2 x 2.8 x 0.5in. Resolution: 1deg Accuracy: in.+/-in. 1deg Ruler Scales: inch/mm Circle on Circle System: Yes Declination Adjustment: Tool-free On the Map Meridian Lines: Yes