Quick Answer
Setting a bearing often involves common mistakes such as not allowing the compass to settle, not taking into account declination, and not using the correct technique for aligning the shadow stick.
Incorrect Compass Alignment
When setting a bearing, it’s crucial to ensure the compass is aligned correctly. A common mistake is not allowing the compass to settle, which means not waiting for the magnetic needle to stabilize before taking a sighting. This can result in an inaccurate bearing. Allow the compass to settle for at least 30 seconds to ensure accuracy.
Declination and Variation
Another critical aspect of setting a bearing is accounting for declination, which is the difference between magnetic north and true north. Failing to take declination into account can lead to significant navigation errors. In areas with high declination, it’s essential to adjust your bearing accordingly. For example, if you’re in an area with a declination of 10 degrees east, you’ll need to adjust your bearing by 10 degrees west to ensure accuracy.
Shadow Stick Technique
The shadow stick technique is a simple yet effective method for setting a bearing. Find a straight stick and mark the end with a small rock or piece of string. Place the stick in the ground, then mark the end of the shadow with a small rock. Wait for some time, then mark the end of the new shadow. Draw a line between the two marks, then draw a line perpendicular to this line at the midpoint. This line will be your bearing.
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