Which type of rehearsal is typically conducted at the unit level to refine plans?

The type of rehearsal typically conducted at the unit level to refine plans is a confirmation briefing or operation rehearsal. This rehearsal serves as a critical component in the planning process, allowing unit leadership to ensure that everyone involved understands the operation's objectives, tactics, and logistics. It provides an opportunity for all participants to review their roles, identify potential issues, and coordinate efforts effectively.

During a confirmation briefing or operation rehearsal, the focus is on validating the plan's feasibility and refining any elements that may require adjustment based on the practical insights of those who will execute the plan. This rehearsal helps to solidify communication and coordination among team members, fostering a more cohesive execution during the actual operation.

In contrast, the other options do not fit the purpose of refining plans at the unit level in the same manner. A preliminary briefing typically serves to introduce concepts or plans rather than refine them, while a strategic planning session generally concerns higher-level discussions that may not directly address unit-level operational details. A pilot program review focuses on evaluating a specific trial initiative, which is distinct from the objective of refining operational plans at the unit level.