Which of the following is NOT information that should be filled in for a data box during Primary Navigation?

The correct choice indicates that the wind vector is not typically filled in for a data box during Primary Navigation. In primary navigation, the focus is on essential flight parameters that directly contribute to the navigation process, such as the magnetic course, leg time, and minimum fuel to continue.

The magnetic course is critical for ensuring that the aircraft follows the intended path in relation to magnetic north, while leg time helps pilots estimate how long it will take to reach the next waypoint, facilitating better flight planning and fuel management.

Minimum fuel to continue is also an essential piece of information, as it informs pilots of the fuel status required to safely reach the next destination or diversion point. This helps in making critical decisions during flight regarding routing and fuel reserves.

In contrast, the wind vector, while important for understanding performance and making adjustments to ground track, is not a primary nav data point entered into the data box, as it is more commonly used in secondary navigation considerations or during flight planning phases rather than real-time navigation execution.