Which of the following is NOT a component of a fighting position?

A fighting position is designed to provide safety and support for individuals during combat operations, allowing them to engage the enemy effectively while minimizing exposure to enemy fire. The components of a fighting position typically include elements that serve functional purposes related to cover, concealment, and operational efficiency.

A parapet serves as a barrier that protects combatants from enemy fire, providing a level of defense while allowing for observation and engagement. The firing step is essential for allowing the soldier to take a stable stance while aiming and shooting, ensuring effective engagement with the enemy. A water sump is typically included to manage water runoff and prevent flooding within the fighting position, contributing to its overall functionality.

In contrast, an observation tower is generally not considered a part of a standard fighting position. While it may provide a height advantage for surveillance and observation, it is not a core component focused on immediate combat operations where the primary concern is safety and efficient engagement capabilities. Thus, the observation tower does not align with the essential elements of what constitutes a fighting position during combat scenarios.