ZCZC JA81 271448 UTC FEB 26 VARNA RADIO NAVWARN 106/26 UNDERWATER ACTIVITY IS CONDUCTED FM 27.02.2026 IN REGION WITH CENTRE: 42 21,3N 027 50,5E AND R= 3 CAB_ J99 PROHIBITED FOR NAVIGATION,ANCHORAGE, FISHING,EXPLOSIVE AND DIVING ACTIVITIES. NNNN