What manned position allows for observation and the ability to employ deadly force against incoming vehicles at an Entry Control Point?

The most suitable answer is the Over-Watch position. This role is specifically designed to provide a vantage point for surveillance and observation, allowing personnel to monitor activities in a given area effectively. In the context of an Entry Control Point, the Over-Watch allows trained personnel to observe incoming vehicles while also being in a position to take necessary defensive actions, including the potential use of deadly force if warranted.

An Over-Watch position is typically elevated or situated in a way that maximizes visibility, which is crucial for assessing threats from a safe distance. Operators in this position are trained to identify potential threats and respond appropriately, thus fulfilling both the observation and engagement roles required at an Entry Control Point.

In comparison, the other options lack the precise capabilities associated with an Over-Watch position. A Guard Post generally focuses on the physical security of a specific location without the heightened observational or engagement capabilities. A Sentinel Position usually implies a role focused on awareness rather than actively engaging threats. The Control Tower, while it may suggest a commanding view, is more associated with air traffic management and less with ground-level engagement scenarios like an Entry Control Point.