What is the primary purpose of a compass?

The primary purpose of a compass is to guide navigation. A compass utilizes the Earth's magnetic field to determine cardinal directions—north, south, east, and west. This tool has been an essential instrument for travelers, sailors, and adventurers throughout history, enabling them to find their way even in unfamiliar terrains or during adverse weather conditions.

By aligning the compass needle, which points towards magnetic north, users can orient themselves and navigate accurately. This functionality is critical for ensuring safe and efficient travel, making compasses invaluable for outdoor activities such as hiking, sailing, or orienteering.

In contrast, measuring temperature, indicating time, or measuring speed involve entirely different instruments and principles. For instance, thermometers are used for temperature measurement, clocks or watches are for time indication, and speedometers measure speed. Each of these functions is not related to navigation, thus reinforcing the compass’s unique role as a navigation tool.