A co-driver is a person who assists the main driver in navigating and managing a vehicle, especially in competitive settings like rally racing. Their primary role is to read maps, provide directions, and help with timing, ensuring the driver can focus on the road. In addition to navigation, co-drivers often communicate important information about road conditions, obstacles, and upcoming turns. This teamwork is crucial for achieving the best performance in races, as both the driver and co-driver must work in sync to handle the challenges of the course effectively.