ZCZC JA53 081447 UTC MAY 26 VARNA RADIO NAVWARN 252/26 VARNA BAY.HYDROGRAPHIC CUTTER 231 WILL BE CARRY OUT HYDROGRAPHIC ACTIVITIES WITH AN AUTONOMOUS UNDERWATER EQUIPMENT FM 0500 TO 1500 UTC FM 11 TO 15.05.2026 IN REGION: 43 180N 028 070E 43 180N 028 102E 43 144N 028 085E 43 144N 028 053E. THE BOAT WILL LOWER OUTBOARD EQUIPMENT AND AN AUTONOMOUS UNDERWATER EQUIPMENT AND WILL BE LIMITED IN ITS ABILITY TO MANEUVER.THE AREA IS TEMPORARILY PROHIBITED FOR NAVIGATIONANCHORING FISHINGDIVING AND ANY TYPE UNDERWATER ACTIVITIES.MARINERS TO KEEP A SAFETY DISTANCE OF 2 CABLES FROM THE BOAT. NNNN