What does the term "deflection" refer to in mortar firing?

• A. The vertical angle of the mortar tube
• B. The horizontal angle adjusted to align the mortar with the target
• C. The speed of the projectile
• D. The time it takes for the round to reach the target

Answer: (B)

The term "deflection" in mortar firing specifically refers to the necessary adjustment made to the horizontal angle of the mortar tube in order to accurately align the weapon with the designated target. This adjustment ensures that the mortar round will travel on the correct trajectory to reach the target, compensating for factors such as wind, target positioning, and range.

Understanding deflection is crucial for effective mortar employment, as it impacts the accuracy of fire. Mortars need to be fired at precise angles, and adjusting the horizontal angle through deflection allows for more effective engagement of targets, improving the overall lethality and effectiveness of the unit's fire support.

The other choices address different aspects related to mortar systems but do not align with the definition of "deflection." The vertical angle relates to elevation adjustments, which are important for distance but are distinctly different from horizontal adjustments. The speed of the projectile is a characteristic of the ammunition and is crucial for understanding its ballistics, while the time taken for the round to reach the target deals with flight time and trajectory but is not relevant to the specific adjustment known as deflection. Therefore, the correct understanding of deflection is critical for any mortar operator to ensure precise targeting and effective engagement.