Reliable navigation begins with knowing where you are in relation to somewhere else. A map provides that relationship; the compass and GPS help you confirm it from different sources.
Use three tools as one system
Map, compass, and GPS are strongest when they are configured to agree rather than treated as separate answers. Start with a current topographic map of the area, then use the compass to take and follow bearings and the GPS to check position, distance, and progress.
Read the ground
Identify ridges, drainages, saddles, contours, trails, and likely decision points before departure.
Orient and measure
Use a clear baseplate compass to orient the map, take bearings, and account for magnetic declination.
Confirm position
Use coordinates, track, and distance as checks against the map and terrain—not as a replacement for them.
Start with the map
Navigation is not simply knowing which way is north. It is knowing what lies north, south, east, and west of your current position. A detailed topographic map shows terrain shape, elevation, drainage, routes, and features that can be checked on the ground.
Choose a map scale that supports the route and mark the intended line of travel, alternatives, water sources, and turnaround locations. A grid makes it easier to describe a point precisely rather than relying on a landmark or an imprecise gesture.
Coordinate the compass
Map north is geographic north, while a compass needle points toward magnetic north. The difference is magnetic declination, and it changes by region and over time. Check the current declination for the area and set the compass accordingly when its design allows it.
A baseplate compass also works as a protractor. It can transfer a bearing between the map and the landscape, helping you compare an intended direction with what you can actually see. Even when using a digital device, retain the ability to orient a paper map and follow a bearing without it.
Field check
Before moving, orient the map, identify one nearby feature, and compare its direction and distance with your instruments. If the three sources disagree, stop and resolve the difference before continuing.
Configure the GPS to match
Set the GPS to use the same coordinate format and map datum as the map. UTM coordinates are useful for communicating a position on a gridded topographic map, while latitude and longitude may be required by other services. The important point is consistency.
GPS devices can provide a helpful position, bearing, track, and distance-to-waypoint. They still depend on batteries, correct settings, an unobstructed signal, and a user who recognizes an implausible result. Carry spare power where appropriate and protect the paper map and compass from the same failure.
A practical sequence
- Orient the map and identify your starting point.
- Compare the visible terrain with contours, drainage, and landmarks.
- Set the compass declination and take a bearing from the map.
- Configure the GPS with the matching datum and coordinate format.
- Use the GPS to confirm—not define—your position and progress.
- Recheck at known features and at every major decision point.
These habits make navigation more resilient. They also make it easier to communicate with a partner, revise a route, or turn around while the choices are still straightforward.
Continue learning
For a longer reference, read the map, compass, and GPS handout. You can also review the navigation learning information and the wider questions archive.