While the autopilot handles the physical task of maintaining altitude and heading during the cruise phase, pilots remain highly active with mission management. Their primary responsibilities include conducting regular fuel checks (usually every 30-60 minutes) to ensure consumption matches the flight plan and monitoring weather radar to navigate around turbulence or storms. They also maintain constant communication with Air Traffic Control (ATC) and manage "oceanic clearances" when flying over areas without radar. Furthermore, they are constantly planning for contingencies, identifying the nearest "equal time point" diversion airports in case of a medical emergency or mechanical issue. On long-haul flights, pilots also rotate through scheduled rest periods in dedicated bunks to ensure they are alert for the landing.