German signals intelligence and reconnaissance vessel FGS Oker A 53 1986-

Great Belt, Denmark, 6 July 2026

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Part of Oste-class Type 423, officially called fleet service ships preceded by Type 422 class succeeded by Type 424. Ordered on 3 July 1985, laid down by Flensburger Schiffbau-Gesellschaft, Flensburg, Germany on 15 December 1986, launched on 24 September 1987 and commissioned on 10 November 1988. Germany-flagged, IMO 4549200, MMSI 211211460 and call sign DRHG.