What is Reverse Bearing and Why Should You Care?
If you've ever navigated with a compass or GPS, you've likely encountered bearings. A current bearing tells you the direction you're heading, but what if you need to know the opposite direction? That's where reverse bearing comes into play. It tells you the direction directly opposite your current bearing, essentially allowing you to trace your steps back.
Imagine you're out hiking, and you need to return to your starting point. Knowing how to calculate reverse bearing can save you a lot of hassle and prevent you from getting lost. It's a useful skill for anyone interested in navigation, sailing, aviation, or even just avid hikers.
How to Calculate Reverse Bearing
Calculating reverse bearing is surprisingly simple. Here's the formula:
[\text{Reverse Bearing} = \text{Current Bearing} + 180]
Where:
- Reverse Bearing is the direction opposite your current course
- Current Bearing is your present direction measured in degrees
Bearings are typically measured in degrees (0 to 360). If your calculated reverse bearing exceeds 360, simply subtract 360 from the result to bring it back within the conventional range.
Calculation Example
Example Problem #1
First, determine your current bearing. Let's say it's 125 degrees.
Plug it into the formula:
[\text{Reverse Bearing} = 125ยฐ + 180ยฐ = 305ยฐ]
So, your reverse bearing is 305 degrees.
Example Problem #2
Suppose your current bearing is 200 degrees.
[\text{Reverse Bearing} = 200ยฐ + 180ยฐ = 380ยฐ]
Since 380 exceeds 360, subtract 360:
[\text{Reverse Bearing} = 380ยฐ - 360ยฐ = 20ยฐ]
Your reverse bearing is 20 degrees.
Quick Reference Table
| Current Bearing (degrees) | Reverse Bearing (degrees) |
|---|---|
| 125 | 305 |
| 200 | 20 |
| 75 | 255 |
Wrapping Up
Next time you're out adventuring and need to backtrack, you'll know exactly which direction to head. Calculating reverse bearing is straightforward and can be a lifesaver in ensuring you reach your destination safely.