What characteristic defines patrol combatant type ships?

The characteristic that defines patrol combatant type ships is their capability for operations exceeding 48 hours at sea. These ships are designed with features that allow them to operate effectively over extended periods, which includes advanced systems for navigation, communication, and combat, enabling them to execute missions in both coastal and open sea environments.

While patrol combatant ships may have some level of involvement with coastal operations or have roles related to amphibious assault and mine warfare, their primary distinguishing feature is their endurance and operational capability, which sets them apart from other smaller vessels that may focus solely on short-term missions or specific tasks. Their extended operational range and endurance allow them to provide sustained presence and readiness in various maritime missions.