to 65 degrees. This was supplemented by an eight-cell Lockheed Martin Mark 41 Mod 5 vertical launch system for RIM-7 Sea Sparrow missiles as a point-defence system. The Sea Sparrow is a semi-active radar homing missile, with a warhead, a range of , and a top speed of Mach 2.5. Two machine guns were fitted for close defence. A missile-armed helicopter was a key component of the frigates' armament. When construction started, both navies were planning for, but had yet to identify, new helicopters to be operated by the frigates; as an interim measure, the RAN used Sikorsky S-70B-2 Seahawks, while the RNZN embarked Westland Wasps. Ships were fitted for but not with a close-in weapons system, two quad-canister Harpoon anti-ship missile launchers, and a second Mark 41 launcher. After the ships were completed, both navies fitted Mark 32 3-tube torpedo launchers to their frigates. These were taken from older ships where possible; for example, Te Kahas launchers came from . The launchers were configured to fire the Mark 46 Mod 5 torpedo, an active/passive homing torpedo with a range of at , and a warhead. Sensors and systems The radar suite includes a Raytheon SPS-49(V)8 ANZ radar for aerial search and long-range surveillance, a Saab 9LV 453 Target Indication Radar for air and surface search, an Atlas Elektronik 9600 ARPA navigational radar, and a second Saab 9LV 453 unit for fire control. All ships were initially fitted with a ThomsonSintra Spherion B hull-mounted bow sonar, for active search and attack operations. From Warramunga onwards, ships were launched with a Petrel Mine and Obstacle Avoidance Sonar system. this was later retrofitted to Anzac. All ships were fitted for but not with a towed-array sonar, with the RAN and RNZN following separate acquisition programs for these. The frigates were also fitted for but not with SATCOM and a Helo datalink. Countermeasures and electronic warfare equipment fitted at launch included Mark 36 SRBOC launchers, an SLQ-25A towed torpedo decoy, four four-cell Nulka decoy launchers, Racal Thorn modified Sceptre-A electronic support measures (ESM) equipment, and a Telefunken PST-1720 Telegon 10 radar intercept unit. The Anzacs were fitted for but not with offboard active ECM systems. The Sceptre-A equipment was unable to meet the required performance specifications, and Thales UK (which previously acquired Racal Thorn) was contracted in 2001 to replace the units with the Centaur ESM. A Cossor AIMS Mark XII identification-friend-or-foe system