Combat stores ships, or storeships, are ships used to store naval supplies. They are used to deliver supplies such as provisions and fuel to combat ships on extended deployments. The United States Navy operated the Sirius and Mars classes and the Royal Navy operated the Fort Rosalie class and continues to operate one Fort Victoria class ship, having scrapped the other. They carried or carry the fleets's refrigerated stores, dry provisions, technical spares, general stores, fleet freight, mail and replacement personnel or specialists.[1][2][3][4][5] Storeships should not be confused with fast combat support ships which are high speed auxiliary ships or tenders which provide maintenance support to flotillas.