ZCZC UA28 202320 UTC APR 26 MONDOLFO RADIO COASTAL WARNING 022/26 APR 17 CENTRAL ADRIATIC SEA. OPTICAL ACOUSTIC SYSTEMS TO HELP NAVIGATION OF THE PLATFORM 'CALPURNIA' -IN POSITION: - 43 53'56''N _M_YMZJ YJJGPONHDP_MYPMZHM_ZYVF_TRANSIT SHIPS BEWARE. NNNN