ZCZC SA22 NCC-HAMBURG 260420 UTC AUG 26 NAV. WARN. NO. 482 GERMAN BIGHT. TSS 'TERSCHELLING-GERMAN BIGHT'. UNDERWATER OPS BY MV 'IEVOLI COBALT' CS 'IBOK' BETWEEN POSITIONS 53-482N 007-204E AND 53-555N 007-106E RESTRICTED MANOEVRABILITY DURING OPERATIONS. BERTH OF 1 NM REQUESTED. NNNN