Armament
Since the withdrawal of the Perth class destroyers, these ships are the RAN's primary air defence vessels, armed with a Mark 13 missile launcher for SM-2 missiles. They also have significant surface capability, being armed with a 76-millimetre (3.0 in) Mk 75 gun and the Harpoon ASM (also fired by the Mark 13 launcher), and a pair of triple torpedo tubes for ASW. In addition, a pair of S-70B Seahawk helicopters are carried.
From 2005 onwards, all RAN frigates deploying to the Persian Gulf are fitted with two M2HB .50 calibre machine guns in Mini Typhoon mounts, installed on the aft corners of the hangar roof. Two TopLite EO directors are used with the guns.
The Australian frigates were originally fitted with American Mark 46 anti-submarine torpedoes, but by 2008, they had been replaced with the European MU90 Impact torpedo in three of the four frigates as part of the FFG Upgrade, with the conversion of Newcastle underway at that point.
Read more about this topic: Adelaide Class Frigate