ZCZC QA91 270240 UTC OCT 26 SPLIT RADIO NAVWNG.: 406/2026 NORTHERN ADRIATIC CHART: 100-16 UNTIL FURTHER NOTICE, M/V MICOPERI TRENTA CONDUCTING WORKS ON POSITION 45-03,7N 013-07,6E (WGS84). NAVIGATION IN RADIUS 2 MILES FROM POSITION, PROHIBITED. NNNN