ZCZC SA91 NCC-HAMBURG 091030 UTC AUG 26 NAV. WARN. NO. 441 GERMAN BIGHT. NORTH OF TSS 'GERMAN BIGHT WESTERN APPROACH'. SURVEY OPERATIONS IN PROGRESS BY MV 'ALKOR' CS 'DBND' BETWEEN FOLLOWING POSITIONS 54-360N 007-030E 54-360N 007-380E 54-160N 007-380E AND 54-160N 007-030E. BERTH OF 1 NM REQUESTED. NNNN