ZCZC FA19 260500 UTC APR ESTONIAN NAV WARN 059/26. GULF OF FINLAND. 290500-291400 UTC APR W OF NAISSAAR ISLAND FIRING PRACTICE AREA 2A CENTRED 59-35N 024-19E FIRING EXERCISES IN PROGRESS OTHER VESSELS MUST AVOID ENTRY INTO THE AREA STANDING BY VHF CH 13 AND 61 CANCEL 291400 UTC APR. NNNN