Haruna was conventionally powered through a traditional boiler/turbine arrangement. There were 2 x boilers with 2 x turbines which drove 2 x shafts at an output of 60,000 horsepower allowing the vessel to make headway at 31 knots.
As a destroyer, Haruna showcased a combination of armament installations. This weapon arrangement was led by the Mk 29 "Sea Sparrow" (Type 3A) surface-to-air missile launcher which featured an eight-shot functionality (8-cell design) and intended for use against incoming aircraft. An RUR-5 ASROC (Anti-Submarine ROCket) launcher was installed through an eight-shot launcher mounted over the helicopter hanger. The deck turrets housed 2 x FMC 5" /54 caliber Mark 42 series rapid-fire naval guns. Close-in defense was handled by 2 x 20mm Phalanx Close-In Weapon Systems (CIWSs). The Haruna also carried anti-ship/anti-submarine prowess through 2 x Mark 32 triple-tube torpedo launchers cleared for the Mark 46 torpedo. Its helicopter stable came into play for Anti-Ship (AS)/Anti-Submarine Warfare (ASW) sorties as well as Over-The-Horizon (OTH) reconnaissance and Search & Rescue (SAR). Supported helicopter types included three Sikorsky SH-60J(K) ASW naval helicopters.
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