What is the QWQC-2 system known for?

The QWQC-2 system is primarily known for its capability to communicate with submarines. This system is essential in a naval operational context, where maintaining effective communication with submerged submarines is crucial for coordinated operations. The QWQC-2 uses various modes of underwater communication to exchange information, providing a tactical advantage and ensuring situational awareness between surface vessels and submarines. Such communication is vital for operations like anti-submarine warfare (ASW) and joint maneuvers, making the QWQC-2 a key component in naval strategies.

The other options, while they may refer to different systems or capabilities in naval operations, do not accurately reflect the primary function of the QWQC-2 system. For instance, automated navigation pertains to systems designed to enhance maneuvering efficiency, high-speed tracking is generally related to radar or missile systems for target acquisition, and countermeasures deployment involves tactics and systems aimed at neutralizing threats. Thus, the function of underwater communication is what distinctly defines the QWQC-2 system.