Introduction
Knowing how to use a compass is a practical skill that can help you navigate outdoors, understand directions and find your way when digital navigation tools are unavailable. Whether you are hiking through a forest, exploring a mountain trail, camping in an unfamiliar area or learning basic geography, a compass can help you determine direction and follow a planned route.
Although a compass may look simple, using it accurately involves more than identifying north. You need to understand its main parts, recognise the four cardinal directions, read a bearing and know how to combine a compass with a map. For longer journeys, you should also understand magnetic declination, which is the difference between magnetic north and true north.
The good news is that compass navigation becomes easier with practice. This beginner-friendly guide explains how to use a compass step by step, how to follow a direction, how to navigate with a map and how to avoid common mistakes.
What Is a Compass?
A compass is a navigation instrument that helps you determine direction. A traditional magnetic compass contains a magnetised needle that aligns with Earth’s magnetic field. When held level and away from magnetic interference, its north-seeking end points approximately towards magnetic north.
Compasses are used for hiking, camping, sailing, surveying, map reading, outdoor education and other activities where knowing direction is important.
Unlike a smartphone navigation app, a basic magnetic compass does not require a battery or mobile signal. However, it works best when used correctly and combined with other navigation skills.
According to REI’s navigation guide, understanding compass parts, magnetic declination, map orientation and bearings forms the foundation of compass-and-map navigation.
Common Types of Compasses
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**1. Baseplate compass**
A popular choice for hiking and map reading. Its transparent baseplate, direction-of-travel arrow and rotating housing make it suitable for taking bearings and working with topographic maps.
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**2. Magnetic compass**
A general term for a compass that uses a magnetised needle to indicate magnetic north. It can help with basic direction finding, although not every model is designed for accurate map navigation.
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**3. Lensatic compass**
This design uses a sighting system to help users take a direction towards a distant object. It is used in some land-navigation and outdoor applications.
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For most beginners learning how to navigate with a paper map, a good-quality baseplate compass is a practical starting point.
Understanding the Parts of a Compass
Before taking a bearing, become familiar with the components of your compass. The exact design varies by model, but a typical baseplate compass includes the following parts.
| Compass part | What it does |
|---|---|
| Magnetic needle | Aligns with Earth’s magnetic field; the marked north-seeking end points towards magnetic north. |
| Compass housing or bezel | Rotates to set or read a direction. |
| Degree markings | Display bearings from 0° to 360° on many navigation compasses. |
| Direction-of-travel arrow | Shows the direction in which you intend to travel. |
| Orienting arrow | Helps align the housing with the magnetic needle. |
| Orienting lines | Help align the compass with north–south lines on a map. |
| Baseplate | Provides a straight edge for aligning the compass between locations on a map. |
| Index line | Indicates the bearing reading on the housing. |
Some compasses also include a declination adjustment, ruler scales and a magnifying lens.
Spend a few minutes identifying these parts before going outdoors. Knowing which arrow indicates your travel direction and which arrow is used to align the needle will help you avoid one of the most common beginner errors: confusing the direction you want to travel with the direction indicated by the needle.
Understanding the Four Cardinal Directions
The four cardinal directions are north, east, south and west. They provide the basic reference points used in compass navigation.
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<text x=”160″ y=”19″>N · North</text>
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<caption>Basic compass directions and their approximate degree bearings.</caption>
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On a compass marked in degrees, the directions are generally represented as follows:
| Direction | Bearing |
|---|---|
| North | 0° or 360° |
| East | 90° |
| South | 180° |
| West | 270° |
| Northeast | 45° |
| Southeast | 135° |
| Southwest | 225° |
| Northwest | 315° |
These values are useful for understanding how bearings work. A bearing is a direction expressed as an angle measured clockwise from north.
For example, if your destination lies due east of your current position, its bearing is 90°. If it lies northwest, the approximate bearing is 315°.
How to Use a Compass Step by Step
If you are learning compass navigation for the first time, begin with finding north. Once you can do that consistently, practise pointing the compass towards a chosen landmark and following a direction.
Step 1: Hold the Compass Flat
Place your compass in your palm or on a level surface. Keep it horizontal so that the needle can move freely.
Wait for the needle to settle before reading it. Tilting the compass may cause the needle to drag against its housing or make the reading difficult to interpret.
Step 2: Find Magnetic North
Look at the marked end of the magnetic needle. On most conventional hiking compasses, the coloured or otherwise marked end identifies the north-seeking end.
Allow the needle to settle and note the direction it indicates. This is magnetic north, not necessarily true north.
Step 3: Identify Your Intended Direction
Decide where you want to go. If you are navigating towards a visible landmark, such as a distinctive tree, hill or building, you can use the compass to establish the direction.
For basic direction finding, point the direction-of-travel arrow towards the landmark. Rotate the compass housing until its north marking and orienting arrow align with the north-seeking end of the needle.
Read the bearing at the index line if your compass has degree markings.
Step 4: Align the Needle and Orienting Arrow
When following a bearing, rotate your body and the compass together until the north-seeking end of the magnetic needle sits inside the orienting arrow. Many outdoor instructors describe this as putting the needle “in the shed.”
Keep the compass level as you turn. Once the needle is aligned, the direction-of-travel arrow indicates the direction associated with the selected bearing.
Step 5: Choose a Landmark Ahead
Look along the direction-of-travel arrow and identify a recognisable feature in the correct direction.
Walk towards that feature, then stop and check the compass again. Repeat the process with another landmark.
This method is often easier and more accurate than staring down at the compass while walking. REI recommends using landmarks and checking your direction as part of following a bearing.
Important: A compass tells you direction, not whether the route is safe or passable. A straight bearing may lead towards a cliff, dense vegetation, private land or another obstacle. Always check the terrain and your map.
How to Read a Compass Bearing
A compass bearing describes the direction from your current location towards a destination. It is commonly measured in degrees clockwise from north.
For example:
- A bearing of 0° or 360° means north.
- A bearing of 90° means east.
- A bearing of 180° means south.
- A bearing of 270° means west.
Bearings allow you to describe a direction more precisely than words such as “left,” “right” or “northwest.”
Example: Following a Bearing of 120°
Suppose your route requires you to travel on a bearing of 120°. This direction lies between east (90°) and southeast (135°).
- Turn the compass housing until the index line shows 120°.
- Hold the compass horizontally in front of you.
- Rotate your body until the north-seeking needle aligns with the orienting arrow.
- Look along the direction-of-travel arrow.
- Identify a landmark in that direction.
- Walk to the landmark and check the bearing again.
This example explains the basic method, but accurate navigation also requires accounting for magnetic declination where appropriate and checking the route against your map.
How to Use a Compass with a Map
A compass becomes more useful when you combine it with a suitable map. A topographic map can show trails, roads, streams, hills, elevation and other features that help you understand the landscape.
The US Geological Survey explains how maps and compasses work together to determine direction and support land navigation.
Step 1: Find Your Starting Point and Destination
Identify your current position and the place you want to reach on the map.
If you are uncertain about your starting position, do not simply guess. Use recognisable terrain features, signs, landmarks or other reliable information to establish where you are.
Step 2: Place the Compass on the Map
Place the straight edge of your baseplate compass between your starting point and destination.
Ensure the direction-of-travel arrow points from your starting point towards your destination, not the other way around.
Step 3: Align the Compass Housing
Keep the baseplate in position while rotating the compass housing. Align the housing’s orienting lines with the map’s north–south grid lines or meridians, making sure the north marking points towards the top of the map.
Do not rotate the compass baseplate away from the route line during this step.
Step 4: Read the Bearing
Read the bearing at the index line. This is the direction from your starting point towards the destination, relative to the north reference used by your compass and map.
Before following it in the field, account for magnetic declination if your setup requires it.
Step 5: Follow the Bearing Outdoors
Lift the compass from the map and hold it level. Rotate your body until the north-seeking end of the needle aligns with the orienting arrow.
Look along the direction-of-travel arrow, select a landmark, and move towards it. Check the bearing and your position regularly as you continue.
The detailed process can vary depending on your compass model and whether declination has been adjusted. For a practical demonstration, consult the REI compass and map navigation guide.
What Is Magnetic Declination?
Magnetic declination is the angle between magnetic north and true north at a particular location. True north refers to the direction of the geographic North Pole, while a magnetic compass responds to Earth’s magnetic field.
The difference matters because many maps use true north or grid north as their reference, while an ordinary magnetic compass points towards magnetic north.
Declination varies by location and changes over time. A value suitable for one region may be inaccurate in another, so you should use current, location-specific information when accurate navigation matters.
How Do You Account for Declination?
First, check your map’s declination information and your compass manufacturer’s instructions. Some compasses allow you to set a declination correction directly. With a compass that does not have this adjustment, you may need to apply the correction manually.
The direction and amount of correction depend on whether you are converting between true, grid and magnetic bearings and on the sign convention used. Avoid relying on a memorised “always add” or “always subtract” rule without checking which direction you are converting.
If you are a beginner, practise using a map and compass together in a familiar area before relying on declination corrections on a remote route.
How to Orient a Map with a Compass
Orienting a map means turning it so that its directions correspond with the surrounding landscape. When a map is oriented correctly, features shown to your left, right, ahead or behind should broadly match what you see on the ground.
To orient a map using a compass:
- Place the map on a reasonably flat surface.
- Place the compass on the map, following the compass manufacturer’s instructions.
- Align the compass with the map’s north reference.
- Turn the map and compass together until the magnetic needle aligns correctly with the orienting arrow, accounting for declination where necessary.
- Compare nearby landmarks on the map with the actual landscape.
Natural Resources Canada describes map orientation as making the map correspond to the ground it represents.
An oriented map is especially helpful when several trails or landscape features look similar. However, orientation alone does not prove your exact position; you still need to identify where you are on the map.
Common Compass Navigation Mistakes
Beginners often find that the compass itself is easy to use but that small errors can cause them to follow the wrong direction.
| Common mistake | How to avoid it |
|---|---|
| Holding the compass at an angle | Keep it level and allow the needle to settle. |
| Confusing the travel arrow with the magnetic needle | Remember that the travel arrow shows your intended direction; the needle indicates magnetic north. |
| Turning the housing instead of your body when following a set bearing | Once the bearing is set, rotate your body and compass together until the needle aligns. |
| Ignoring magnetic declination | Check the local declination and use a consistent method with your map. |
| Walking while looking down continuously | Pick a landmark, walk to it, then check your direction again. |
| Using a compass near magnetic objects | Move away from vehicles, phones, magnets, metal objects and other potential sources of interference. |
| Following a straight bearing without checking terrain | Use a map to identify obstacles and choose a safe route. |
| Assuming the compass gives your exact location | Use landmarks, a map and other reliable information to establish your position. |
Magnetic interference is particularly important. Phones, watches, metal equipment and nearby vehicles can affect a compass reading, so move away from such objects when taking a bearing.
Tips for Using a Compass While Hiking or Camping
A compass can be a useful part of your outdoor equipment, but safe navigation depends on preparation as well as the instrument itself.
Carry a Suitable Map
Take a current map that covers the area you intend to explore. Learn to recognise its symbols, scale, contour lines and north reference before leaving.
Plan Your Route in Advance
Identify your destination, possible alternative routes and prominent features along the way. Let someone know your plans when travelling in remote areas.
Check Your Position Regularly
Do not wait until you feel lost before consulting your map. Check your location at useful landmarks, trail junctions and other identifiable features.
Use a Compass with Other Navigation Skills
A compass is not a replacement for map reading, terrain awareness or sound decision-making. Learn to estimate distance, recognise landmarks and interpret the landscape.
Carry Backup Navigation Tools
A phone or GPS device can provide useful additional information, but batteries can run out and electronics can fail. A paper map and compass provide a non-electronic backup when used correctly. REI includes map-and-compass skills among its recommended outdoor navigation essentials.
Practise Before a Remote Trip
Start in an open, familiar area. Practise finding north, reading bearings, orienting a map and following short routes. Build confidence before attempting difficult terrain or low-visibility navigation.
How to Find Your Location Using a Compass
A compass primarily gives you direction. To estimate your position, you need to combine compass bearings with identifiable landmarks and a map.
One technique is called resection, sometimes informally described as triangulation. You take bearings to known landmarks and plot the corresponding lines on your map.
A simplified process is:
- Identify a visible landmark that you can also locate on your map.
- Hold the compass level and point the direction-of-travel arrow at the landmark.
- Rotate the housing until the north-seeking needle aligns with the orienting arrow.
- Record the bearing and account for declination as required.
- Transfer the bearing to the map using the appropriate reverse-bearing method.
- Repeat the process with another known landmark that is well separated from the first.
- Use where the plotted lines intersect to estimate your position.
The method requires accurate landmark identification, correct bearing conversion and consistent map references. Two bearings may give an approximate position, while a third can help reveal errors. REI explains the use of multiple landmark bearings for determining location on a map.
If you are unsure about your position in difficult terrain, stop and reassess rather than continuing based on a rough estimate.
Conclusion
Learning how to use a compass is a valuable outdoor skill that can help you find direction, follow bearings and navigate with a map. Start by understanding the compass needle, housing and direction-of-travel arrow. Then practise finding north, reading degree bearings and following a route between visible landmarks.
As your confidence grows, learn to orient a map, account for magnetic declination and use bearings to estimate your location. Remember that a compass cannot tell you whether a route is safe or identify your exact position by itself.
The best way to develop reliable compass navigation is to practise in a familiar area, carry an appropriate map and check your position regularly. For hiking, camping and other outdoor activities, these skills can provide a useful backup when digital tools are unavailable.
How do you use a compass for beginners?
Hold the compass level, allow the needle to settle and identify its north-seeking end. Decide which direction you want to travel, set the bearing if your compass has a rotating housing, then turn your body until the needle aligns with the orienting arrow. Follow the direction-of-travel arrow towards a landmark and check your bearing regularly.
How do you find north with a compass?
Hold a magnetic compass horizontally and wait for the needle to settle. The marked north-seeking end indicates magnetic north. It does not necessarily point to true north, so consider local magnetic declination when navigating accurately with a map.
What do the numbers on a compass mean?
On a compass marked in degrees, the numbers represent bearings from 0° to 360°. North is 0° or 360°, east is 90°, south is 180° and west is 270°. The numbers between these values represent intermediate directions.
Can you use a compass without a map?
Yes. You can use a compass to find magnetic north, determine a direction and follow a bearing towards visible landmarks. However, a map provides important information about your location, terrain, obstacles and route options.
Why does a compass needle point north?
A magnetic compass needle aligns with Earth’s magnetic field. The marked north-seeking end points approximately towards magnetic north. Because magnetic north and true north are different references, a compass reading may need correction when used with a map.
