ZCZC FA81 160602 UTC OCT ESTONIAN NAV WARN 177/26. GULF OF FINLAND. 190600-191400 UTC OCT 201000-201900 UTC OCT 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 201900 UTC OCT. NNNN