Quick Answer
Contour lines are crucial when plotting a course because they provide a visual representation of the terrain, helping you identify steep slopes, cliffs, and other hazards that could affect your navigation. By analyzing contour lines, you can determine the best route to take and avoid potential dangers. This is essential for safe and efficient movement in the wilderness.
Understanding Contour Lines
Contour lines are used to represent the shape and elevation of the terrain on topographic maps. They are typically drawn at regular intervals, usually 10 to 20 meters (30 to 60 feet) apart, and are used to help you visualize the landscape. By studying contour lines, you can identify features such as ridges, valleys, and peaks, as well as areas of steep slope or flat terrain.
Plotting a Course
When plotting a course, contour lines are essential for identifying the best route to take. By analyzing the contour lines, you can determine the most efficient route, taking into account obstacles such as cliffs, steep slopes, and bodies of water. For example, if you are trying to navigate a mountainous region, you can use contour lines to identify a safe route that avoids steep slopes and follows a gentler incline. This can be especially important when navigating in poor visibility or at night, when it’s difficult to read the terrain.
Reading Contour Lines in Action
To read contour lines effectively, follow these steps: First, identify the contour interval, which is the distance between each contour line. Next, look for the shape of the contour lines, which can indicate the shape of the terrain. For example, a series of contour lines that are close together may indicate a steep slope, while a series of lines that are far apart may indicate a gentler slope. Finally, use a protractor or compass to measure the angle between contour lines, which can help you determine the direction of the terrain.
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