What system satisfies the operational need of the Navy and Marine Corps for engine/propeller installation and removal?

The correct answer is the Engine Installation and Removal Vehicle (EIRV). This system is specifically designed to meet the operational requirements of the Navy and Marine Corps regarding the installation and removal of aircraft engines and propellers. The EIRV enhances efficiency and safety during maintenance operations, thereby supporting the overall readiness of the fleet.

The EIRV uses specialized equipment to safely lift, transport, and install or remove engines and propellers on various types of military aircraft. This capability is critical, as timely maintenance can significantly affect operational availability and performance.

While other systems may have their own specific functions within the Navy and Marine Corps, they do not directly address the unique operational need for engine and propeller handling. For instance, ENGIM is related to engine management, EMALS pertains to advanced catapult systems, and JETT is focused on jet engine testing. None of these systems fulfill the same direct purpose as EIRV in terms of installation and removal tasks.