ZCZC SA23 NCC-HCMBURG 171230 UTC JUN 26 NAV. WARN. NO. 352 GERMAN BIGHT. SOUTH OF TSS 'GERMAN BIGHT WESTERN APPR ACH'. SURVEY OPERATIONS BY MV 'FUGRO FRONTIER' CS '5BSC6' IN AREA BETWEEN 53-556N 007-122E 54-080N 007-098E UND UTRAPYNQN 006-030E RESTRICTED MANOEVRABILITY DURI G OPERATIONS. BERTH OF 1 NM REQUESTED. NNNN