What should pilots avoid to minimize the risk of the Coriolis illusion?

To minimize the risk of the Coriolis illusion, pilots should specifically avoid abrupt head movements. This type of illusion occurs when a pilot experiences a sudden change in angular velocity, particularly when the head is turned sharply. When a pilot makes these abrupt movements, it can create a misleading sensation of movement or orientation, leading to a misperception of the aircraft's attitude.

In the context of flying, especially under visual flight rules or in conditions where outside references may be limited, maintaining a steady visual reference is crucial. Abrupt head movements disrupt this reference, potentially causing disorientation or poor decision-making. By avoiding such movements, pilots can help ensure a more stable sense of orientation and reduce the risk of experiencing the Coriolis illusion.

The other choices, while they may present certain challenges or risks, are not directly related to the Coriolis illusion in the same way. Long straight flights and daylight flying do not typically contribute to the confusion associated with this specific type of spatial disorientation, as the factors that influence the Coriolis illusion are more closely tied to how the pilot's body and head respond to rotational forces. Sudden vertical movements could contribute to other sensations but are not as directly impactful on the Coriolis illusion as abrupt head movements