Chevalier Paul is a Horizon-class frigate of the French Marine Nationale commissioned in June 2009, the third vessel of the French Navy named after the 17th century admiral Chevalier Paul. The main mission of this type of ship is the escort and protection of a carrier strike group formed around an aircraft carrier, usually Charles de Gaulle or one of the aircraft carriers of the US Navy, or an amphibious operation carried out by amphibious helicopter carriers. The ship's specialty is air traffic control in a war zone, but it can be employed in a wide variety of missions, such as intelligence-gathering, special forces operations, or in protecting less well-armed vessels. Horizon-class frigates such as Chevalier Paul are the most powerful surface combatants that France has ever built. In service since the end of 2011, it bears the pennant number D621. Its namesake is Jean-Paul de Saumeur, better known as Chevalier Paul, a French naval officer born in Marseille in 1598.