ZCZC SA85 NCC-HAMBURG 190815 UTC MAY 26 NAV. WARN. NO. 308 GERMAN BIGHT SOUTH OF OWP 'BARD'. SURVEY OPERATIONS IN PROGRESS BY MV 'GEO OCEAN 3' CS 'LXGP' AROUND POSITION 54-178N 006-015E VESSEL TOWING MEASURING INSTRUMENTS. RESTRICTED MANOEVRABILITY DURING OPERATIONS. BERTH OF 500M REQUESTED. NNNN