 A Raytheon/General Dynamics Phalanx Mark 15 Mod 21 Close-In Weapon System (CIWS) is mounted on top of the helicopter hangar for "last-ditch" defence against targets that evade the Sea Sparrow.As built, the main gun on the forecastle is a /70 calibre Mark 2 gun from Bofors.The gun is capable of firing shells at a rate of 220 rounds per minute at a range of more than .