by tonytran2015 (Melbourne, Australia).
When you are outdoor, you often need to work out the distances to various objects around you so that you can plan your activities and know exactly where you are on your map to be in control of your trip, to make your plan to get back to safety, or to inform your rescuers of your exact position. However the challenge arises you have to make angle and distance measurements but neither can nor should employ any instrument, such as when hiking, when riding a motor-bike, or when on a touring bus. In such cases measuring angles with bare hands is the only method left. (Accurate measurement of angles allows determination of distances in survival situations.)
The method is described here and it uses the edges of the index and middle fingers as parallel guide lines for measuring angles. (Measuring posture must be correct to keep…
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