ZCZC SA73 NCC-HAMBURG 271045 UTC SEP 26 NAV. WARN. NO. 541 GERMAN BIGHT. TSS 'TERSCHELLING-GERMAN BIGHT'. UNDERWATER OPERATIONS IN PROGRESS BY MV 'NORTHERN MARIA' CS 'OZAV2' IN AREA BETWEEN 53-455N 007-148E AND 53-569N 006-559E RESTRICTED MANOEVRABILITY DURING OPERATIONS. BERTH OF 500M REQUESTED. NNNN