ZCZC QA81 171845 UTC SEP 26 SPLIT RADIO NAVWNG:349/2026 NORTHERN ADRIATIC CHARTS: 100-15, 100-16, INT 3410 SEPTEMBER 18TH AND 19TH 2026., STARTING AT 2000 LT (1800 UTC) INTERNATIONAL REGATTA ON ROUTE TRIESTE - SVETI IVAN NA PUCINI (ROVINJ) - TRIESTE. WIDE BERTH REQUESTED. NNNN