Which type of ships is designed to provide direct material support to deployed naval units?

The correct answer is mobile logistics type ships, as these vessels are specifically designed to provide direct material support to deployed naval units, which includes supplies such as fuel, ammunition, food, and spare parts. Their primary function is to enhance the operational capabilities of fleet units by ensuring they have the necessary resources to conduct missions without having to return to port for resupply.

Mobile logistics type ships can operate in forward areas, enabling them to deliver support directly where it is most needed, thus maintaining the combat readiness and sustainability of naval operations. They play a crucial role in extending the operational reach of the navy and facilitating sustained naval presence.

Other types of ships mentioned have different roles. Support type ships are a broader category and may include various support functions, but they don't specifically focus on providing direct material support as mobile logistics ships do. Frigate ships are primarily designed for anti-submarine warfare and escort duties, while submarine tenders are specialized ships that provide logistical support specifically to submarines, rather than overall fleet support.