ZCZC SA06 NCC-HAMBURG 191630 UTC APR 26 NAV. WARN. NO. 225 GERMAN BIGHT. SURVEY OPERATIONS IN PROGRESS BY MV 'FUGRO DISCOVERY' RZ '3EKE6' IN AREA BETWEEN 55-010N 005-580E 55-138N 006-101E 55-107N 006-201E AND 55-000N 006-073E. RESTRICTED MANOEVRABILITY DURING OPERATIONS. BERTH OF 1 NM REQUESTED. NNNN