What does NAVSEA refer to?

NAVSEA stands for Naval Sea Systems Command, which is a division of the United States Navy responsible for the design, construction, maintenance, and repair of naval ships, submarines, and their combat systems. This command plays a crucial role in ensuring the operational readiness and effectiveness of the Navy's fleet, overseeing a vast range of activities that include research, development, and acquisition of naval technology.

The other options represent different military bodies or commands with distinct functions. Naval Auxiliary Systems Command focuses on auxiliary and support systems, the Naval Security Agency pertains to intelligence and security operations, and Naval Operations Command is involved in the strategic oversight of naval operations. However, NAVSEA specifically encompasses the core responsibilities of naval engineering and shipbuilding, making it the correct choice in this context.