ZCZC SA25 NCC-HAMBURG 021500 UTC SEP 26 NAV. WARN. NO. 490 GERMAN BIGHT. TSS 'TERSCHELLING- GERMAN BIGHT'. UNDERWATER OPERATIONS BY MV 'GO ELECTRA' CS 'V7ZR6' IN AREA BETWEEN 53-540N 006-590E AND 53-565N 006-565E. RESTRICTED MANOEVRABILITY DURING OPERATIONS. BERTH OF 1 NM REQUESTED. NNNN