Which type of ship's designation includes the letter "N" in its classification?

The designation that includes the letter "N" in its classification specifically refers to nuclear-powered vessels. In this context, a Nuclear Aircraft Carrier is classified with the "N" to indicate that it utilizes nuclear propulsion. This characteristic allows these carriers to operate for extended periods without refueling, which significantly enhances their operational range and flexibility compared to conventionally powered ships.

In naval terminology, the use of "N" in the classification signifies an advanced propulsion system that contributes to the overall effectiveness and capabilities of the ship. This is particularly important for aircraft carriers, which serve as substantial platforms for air power and can project force globally.

Other ship classifications, such as Destroyers or Auxiliaries, do not include "N" in their designations because they generally rely on conventional propulsion methods. This distinction assists in identifying the type of energy source utilized, thus providing insight into the ship's operational capabilities and strategic advantages within naval operations.