During level flight, how should the attitude indicator be aligned?

During level flight, the correct alignment of the attitude indicator requires the miniature airplane to be aligned with the horizon bar. This indicates that the aircraft is flying straight and level without any pitch or bank. The horizon bar represents the actual horizon, while the miniature airplane represents the aircraft's nose. When both are properly aligned, it shows that the aircraft is maintaining level flight, which is crucial for stable navigation and safe flying.

In level flight, if the miniature airplane is above or below the horizon bar, it suggests that the aircraft is climbing or descending, respectively. Similarly, if the horizon bar is displaced to the left or right of the miniature airplane, it implies the aircraft is banked, indicating a turn rather than level flight. Therefore, for the attitude indicator to reflect true level flight, the miniature airplane must be aligned with the horizon bar.