Naval aircraft are used to airlift supplies, insert specialized personnel (e.g. medical staff, relief workers), and evacuate persons in distress in the aftermath of natural disasters. Naval aircraft are vital in cases where traditional infrastructure to provide relief are destroyed or overtaxed in the wake of a disaster, such as when a region's airport is destroyed or overcrowded and the region cannot be effectively accessed by road or helicopter. The capability of ships to provide clean, fresh water which can be transported by helicopter to affected areas is also valuable.