One ship provides a capability only when it is ready, while two improve the odds without guaranteeing uninterrupted coverage. Three make an available hull much more likely, but a four-ship force is the familiar minimum for continuous at-sea deterrent patrols. Additional hulls create options for concurrent deployments and rapid reinforcement. They also prevent one accident or maintenance overrun from cascading through the entire operating schedule. The Queen Elizabeth class can support amphibious operations, but using a 65,000-ton carrier close to an enemy coast demands a strong reason and appropriate air protection.
Notable Point · 1:16:37-1:19:21
Why one carrier does not create continuous availability
Fleet size determines whether maintenance and accidents leave a country with an available carrier, while larger pools absorb schedule overruns more safely.