ZCZC JA27 281857 UTC OCT 26 VARNA RADIO NAVWARN 766/26 BLACK SEA. BULGARIA. EAST OF SHABLA CAPE. M/V KHORYV IMO 8138712 SIGHTED CAPSIZED AND PARTIALLY SUBMERGED DRIFTING IN POSITION 43-30.60N 028-43.69E AT 281800 UTC OCT 26. VESSEL UNMANNED UNLIT AND POSES NAVIGATIONAL DANGER. CAUTION ADVISED. WIDE BERTH AT LEAST 0.5 NM REQUESTED. NNNN