ZCZC SA55 NCC-HAMBURG 080520 UTC MAY 26 NAV. WARN. NO. 277 GERMAN BIGHT. 'WEISSE BANK' MEASURING INSTRUMENTS ESTABLISHED WITHIN A RADIUS OF 2,8 NM AROUND POSITION 54-56,2N 006-05.3E MARKED WITH YELLOW AND RED MARKERBALL MINIMUM BERTH OF 100 METERS REQUESTED. ANCHORING AND FISHING PROHIBITED. NNNN