Which landing craft is capable of sustained sea operations for approximately 7 days?

The Landing Craft Utility (LCU) is specifically designed for sustained sea operations, capable of operating in various conditions for approximately 7 days. This extended operational range is made possible by its larger fuel capacity and ability to carry more supplies and personnel, which is essential for amphibious missions where prolonged missions can be required.

The LCU's design allows it to transport troops, vehicles, and cargo from sea to shore, making it a vital asset in amphibious warfare. It supports a variety of mission profiles, such as landing operations, logistical support, and evacuation of personnel, which necessitates its ability to remain at sea for extended periods without returning to port.

Other landing craft types have different operational capabilities and designs that limit their time at sea. For instance, the LCAC (Landing Craft Air Cushion) and LCM (Landing Craft Mechanized) are primarily used for rapid transport and have shorter operational durations. The LCVP (Landing Craft Vehicle Personnel) also has limited endurance due to its design focusing more on speed and troop deployment rather than extended sea operations.