ZCZC UA90 082320 UTC APR 26 MONDOLFO RADIO COASTAL WARNING 172/26 APR 05 ALT CENTRAL ADRIATIC SEA - PESCARA. FAILURE OF THE OPTICAL NAVIGATION AIDS SYSTEMS ON THE GIOVANNA PLATFORM IS REPORTED IN POSITION: LAT. 42 46' 02''N - LONG. 014 27' 50''E. TRANSITTING VESSELS PLEASE PAY MAXIMUM CAUTION NNNN