Quick Answer
A compass is a vital addition to any navigation system, even if you have a GPS. It provides a reliable, battery-free means of orienting yourself, allowing you to navigate during emergencies or when your GPS device fails. A compass is also useful for triangulating your position and tracking your route.
Understanding Compass Basics
A compass is a simple yet effective tool for navigation. To use it correctly, you need to understand the basics of magnetic declination, which is the difference between the magnetic north and true north. This value varies depending on your location, so it’s essential to check the current declination for your area before heading out. A declination of 10 degrees, for example, means that the magnetic north is 10 degrees east or west of the true north.
Compass Techniques for Navigation
To navigate using a compass, start by orienting the compass with the magnetic needle pointing towards the magnetic north. Then, use the direction-of-travel arrow to point towards your destination. To track your route, use the compass to set a bearing and follow the needle as it moves. This technique is called “dead reckoning.” To ensure accuracy, take regular compass readings and update your bearing to account for any changes in your course.
Emergency Navigation with a Compass
In the event of a GPS failure or emergency, a compass can be a lifesaver. To use it effectively, start by taking a reading of your surroundings to get a sense of your location. Then, use your compass to orient yourself and take a bearing towards a known landmark or destination. This will help you stay on course and increase your chances of survival. Remember to always carry a backup compass or a map with a compass rose to ensure you have a reliable means of navigation.
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