The Ahmed Yani (formerly the Evertsen) is an Indonesian Van Spiejk Class frigate launched in 1966 and transferred to the Indonesian navy from the Netherlands in the mid-1980s. She has a displacement of 2225 tons and is powered by two Werkspoor/English Electric double reduction geared turbines rated at 30000 shp providing a top speed of 28.5 knots and a maximum range of 7200 km at 12 knots. She is manned by a crew of 180. Armaments consist of two Short Bros Seacat anti-aircraft quad missile launchers; one OTO Melara 76 mm/62 compact dual-purpose gun and six 324 mm Mk 32 torpedo tubes arranged in two triple arrangements, firing the Honeywell Mk 46 anti-submarine torpedo. A WestlandWestland Wasphelicopter is also carried. Research Abdul Halim Perdanakusuma
 
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