Derivatives / Succeeded by 1977 air search radar Type 1022 Specifications D bandfrequency Used by 1972 Nilgiri class frigate FF 11978 Kortenaer class frigate FF 11991 Karel Doorman class frigate FF 11994 F 123 Brandenburg class frigate FF 11994 Naresuan class guided-missile frigate FFG 12000 Brahmhaputra class frigate FF 12014 Kolkata class guided-missile destroyer DDG 1 In Service Indian Navy Royal Netherlands Navy Chilean Navy Belgian Navy Portuguese Navy German Navy Royal Thai Navy