A fast attack craft (FAC) - also referred to as a PTG or a PCG - is a small, fast, agile, offensive, often affordable warship armed with anti-ship missiles, gun or torpedoes. FACs are usually operated in close proximity to land as they lack both the seakeeping and all-round defensive capabilities to survive in blue water. The size of the vessel also limits the fuel, stores and water supplies. Their displacements are usually under-700 tons and can reach speeds of 25+ knots or 46+ kph.