Final answer:
When a howitzer is experiencing no displacement relative to the Aiming Posts, the posts should appear aligned through the gunner's perspective.
Step-by-step explanation:
If a howitzer (a type of artillery) is experiencing no displacement when viewing the Aiming Posts, it suggests that the gun is in a stable position relative to the target, and assuming that the Aiming Posts have been properly set up, they should appear aligned to the gunner. This orientation is essential for maintaining accuracy in firing the howitzer, as even small deviations can result in large errors over distances. Precision in aligning the Aiming Posts is critical to correct projectile motion, ensuring that the trajectory of the cannonball follows the intended path.
Considering the provided reference information on projectile motion, which illustrates the trajectory of a cannonball fired at a horizontal angle versus one dropped with no horizontal velocity, we understand that both follow the same vertical descent due to gravity. This principle is fundamental in calibrating aiming devices like Aiming Posts, as it accounts for the natural effects of gravity on the projectile's path, regardless of the horizontal velocity imparted by the howitzer.