ZCZC JA69 010100 UTC JAN 26 VARNA RADIO NAVWARN 29/26 PORT OF BURGAS. HYDROTECHNICAL ACTIVITIES ARE CARRIED OUT AT THE END OF THE BREAKWATER IN REGION: 42 28893N 027 28930E 42 28828N 027 28934E 42 28833N 027 29084E 42 29231N 027 29051E 42 29293N 027 28976E IN THE SOUTHERN PART MARKED WITH A 'SPECIAL BUOY' YELLOW COLORWITH A FLASHING YELLOW LIGHTWITH COORDINATES: 42 28826N 027 29006E. IT IS FORBIDDEN TO ENTER FOR OTHER VESSELS NOT ENGAGED IN HYDROTECHNICAL ACTIVITIES. ALL VESSELS MANEUVERING IN THE PROXIMITY OF DREDGING VESSELS SHALL MOVE AT THE MINIMUM SAFE SPEED FOR THE GIVEN VESSEL AND TO MAINTAIN A MAXIMUM SAFE DISTANCE FROM THEM. NNNN