What is the primary purpose of a magnetic compass in electronic navigation?

The primary purpose of a magnetic compass in electronic navigation is to back up electronic systems in case of failure. The magnetic compass provides a reliable, simple means of determining direction based on Earth's magnetic field, independent of electronic devices. This becomes especially critical in situations where electronic navigation systems may malfunction due to technical issues, power loss, or environmental factors that affect electronic equipment.

In the context of electronic navigation, the compass serves as a vital backup tool, allowing mariners to maintain orientation and navigational decision-making capabilities even when primary systems fail. It is a fundamental instrument that helps ensure safety and redundancy in navigational practices.

While enhancing visual chart plotting or serving as a main navigation system may sound relevant, those tasks are typically performed by electronic systems that provide more complex navigational data. Additionally, calculating the speed of a vessel is not within the function of a magnetic compass, which only indicates direction.