Final answer:
The Transportation Officer retains overall responsibility for unit movement preparation and execution.
Step-by-step explanation:
In terms of unit movement preparation and execution, the Transportation Officer retains overall responsibility. This officer oversees the planning and coordination of transportation for the unit, ensuring the timely and efficient movement of personnel and equipment. They work closely with other personnel, such as the Deployment Coordinator, Unit Movement Officer, and Logistics Coordinator, to ensure smooth operations.