A magnetic compass is an essential tool for navigation, allowing travellers to find their way by aligning the compass needle with the Earth's magnetic field. However, there are several synonyms for this useful instrument, including mariner's compass, sailors' compass, nautical compass, and sea compass. These terms have been used interchangeably throughout history to describe the same device, which has remained a dependable resource for seafarers and explorers alike. Additionally, the term gyrocompass is often used to describe a modern navigation tool that uses a spinning gyroscope to determine direction without relying on Earth's magnetic field.