ZCZC UA24 182320 UTC APR 26 MONDOLFO RADIO COASTAL WARNING 172/26 APR 05 (3 REPETITION) 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