How to Use Your Compass to Navigate: The Essential Guide to Orienteering

You’ve got a fully charged phone, a reliable navigation app, and maps downloaded for offline use. So, why should you bother learning how to use a compass to navigate?

The answer is simple: battery failure, signal loss and equipment malfunction.

In the wilderness, technology is a luxury, but a compass and a paper map are a necessity. While a GPS tells you exactly where you are and a map gives you a bird’s-eye view of the terrain, your compass is the tool that connects those two worlds, allowing you to plot a route and confidently follow it even when visibility is poor or the clouds are rolling in.

By the end of this guide, you’ll be able to move beyond just pointing north and start taking a precise bearing to navigate any trail.

The Anatomy of Your Compass: Knowing Your Tool

Before you start walking, you need to understand the simple parts of your compass. Most modern hiking compasses are a baseplate compass (or orienteering compass), and they all have these five critical components:

The Key Components and Their Functions

1. The Magnetic Needle: This is the essential part. It’s magnetized and always points to Magnetic North.
2. The Housing (Bezel): This is the large, rotating dial around the needle. It’s marked with 360 degrees and often features the letters N, E, S, and W.
3. The Direction of Travel (DOT) Arrow: The large, non-moving arrow found on the baseplate. This is the direction you want to walk.
4. The Baseplate: The clear plastic ruler or plate that holds the compass components. Its straight edge is used to align points on a map.
5. The Index Line: A mark or arrow where you read the final, precise degree measurement (your bearing) after rotating the housing.

Magnetic vs. True North

This is the most crucial concept to master.

• True North is the actual top of the world (the North Pole) where all the lines of longitude meet. This is what your map is aligned to.
• Magnetic North is a shifting point in northern Canada where the Earth’s magnetic field converges. This is what your compass needle points to.

The difference between these two points is called Declination. Ignoring it is the single greatest reason hikers get lost.

Preparation: Calibrating Your Compass (Declination)

The first step in using your compass accurately is adjusting for magnetic declination. This ensures that the route you plot on a True North map is the route you actually follow using your Magnetic North-reading compass.

Finding Your Local Declination Value

Every region has a different declination value. You need to know this value before you leave home:

• Check the Map: Topographic maps often list the declination value for the area they cover.
• Use Online Resources: Websites like the NOAA Magnetic Field Calculator can give you the precise declination value for any specific location and date.

Setting the Declination (If Your Compass Supports It)

If your compass has a small screw or adjustment feature, you can set the declination once and forget about it. This physically offsets the orienting lines to account for the difference.

• Alternative for fixed compasses: If your compass doesn’t adjust, you will have to manually add or subtract the declination value from your final bearing every time you take a reading.

Step-by-Step: The Three Essential Navigation Moves

Once your compass is calibrated (or you know the declination value), you’re ready to start navigating. There are three core moves you’ll repeat to get from point A to point B.

Move 1: Orienting Your Map

Before you can trust a bearing, you must align your map with the real world around you.

1. Lay the Map Flat: Place your map on a level surface, like a rock or the ground.
2. Align the Compass: Place the edge of your compass on the map, aligning the baseplate with one of the North-South grid lines (or the North arrow printed on the map).
3. ‘Red in the Shed’: Rotate the entire map (and the compass sitting on it) until the magnetic needle sits perfectly inside the Orienting Box. The North arrow on the needle must align with the North letter on the housing.

Result: The map is now aligned with the real world. North on the map is pointing to true North outside.

Move 2: Taking a Bearing (Map to Compass)

This step translates your desired path on the map into a numerical degree measurement (a bearing).

1. Plot the Route: Place the edge of the compass baseplate on the map, connecting your current location (A) to your destination (B).
2. Rotate the Housing (Bezel): DO NOT move the baseplate or the map. Rotate only the housing until the orienting lines inside the housing are parallel to the North-South grid lines on the map. Make sure the North arrow on the housing is pointed toward the top of the map.
3. Read the Bearing: Look at the index line (the mark on the baseplate) and read the degree measurement it points to. This is your bearing—the number you need to follow.

Move 3: Following the Bearing (Compass to Reality)

Now you translate that degree measurement into an actual line of travel in the field.

1. Hold It Flat: Hold the compass flat and steady in front of you, with the direction of travel (DOT) arrow pointing straight away from your body.
2. Turn Your Body: Rotate your entire body until the magnetic needle (the red end) is perfectly back inside the orienting box on the housing. This is your “Red in the Shed” alignment.
3. Look Up: The DOT arrow is now pointing exactly along your 360-degree line of travel.
4. Pick an Aiming Point: Identify a distant, fixed object (a rock, a uniquely shaped tree, or a hilltop) that lies directly along the path of the DOT arrow. This is your aiming point.
5. Walk and Repeat: Put the compass away, walk to your aiming point, and then take a new reading from that new location to find the next aiming point. This keeps you on course.

Troubleshooting and Advanced Tips

Even with the right bearing, the real world is rarely a straight line. Here are a few essential tips for navigating obstacles and common errors.

Dealing With Obstacles (The Detour Method)

If a giant thicket or cliff blocks your path, you need to detour without losing your direction. The easiest method is “boxing” around the obstacle:

1. Walk 90 degrees to the left or right of your bearing.
2. Walk a known distance (e.g., 50 paces).
3. Walk straight along your original bearing until you clear the obstacle.
4. Walk back the same distance you walked in step 2.
5. Turn back to your original bearing and continue your travel.

Avoiding Magnetic Interference

Keep your compass away from metal objects that can throw off the magnetic needle:

• Power lines
• Car keys
• Cell phones
• Headlamps and flashlights
• Metal belt buckles or watch bands

Tip: Always hold the compass at arm’s length, away from your body, when taking a final reading.

Pairing Pace Count With Bearing

For true confidence, you need to know not just where you’re going, but how far you’ve gone.

• Pace Count is the number of steps you take to walk a set distance, usually 100 meters. Count your steps while walking a known distance at home so you know your personal average.
• Once on the trail, keep a mental or written tally of your pace count to confirm you’ve covered the distance planned between map points.

Practice Makes Perfect

Mastering compass and map navigation provides an invaluable safety net and a deep sense of connection to the wilderness. You’ve now learned the anatomy, how to adjust for declination, and the three crucial moves to get from your map to your destination.

The next step is to get outside and practice! Start in a local park or a simple, marked trail before relying on these skills in a remote area.