What is the designation CVN used for?

The designation CVN is used to denote "Carrier Vessel Nuclear." This classification specifically refers to aircraft carriers in the United States Navy that are powered by nuclear reactors. These vessels are designed to support air operations at sea and can operate for long durations without needing to refuel, thanks to their nuclear power systems. This capability significantly enhances their operational range and effectiveness compared to conventional power sources.

While the other choices provide variations of terminology related to naval vessels, they do not accurately represent the specific function and characteristics of CVN ships. The focus on nuclear power is what distinguishes CVN from other types of vessels, emphasizing the advanced technology and capabilities inherent in these nuclear-powered aircraft carriers.