ZCZC SA21 NAVTEX-HAMBURG (NCC) 280420 UTC APR 26 NAV. WARN. NO. 243 GERMAN BIGHT. WEISSE BANK. SURVEY OPERATIONS BY MV 'FUGRO SYNERGY' CS 'C6XR3' AROUND POSITION 54-50N 006-12E RESTRICTED MANOEVRABILITY DURING OPERATIONS BERTH OF 2 NM REQUESTED. CANCEL NAV. WARN. NO. 194. NNNN