ZCZC FA56 050639 UTC SEP ESTONIAN NAV WARN 117/25. GULF OF FINLAND. 080800-081301 UTC SEP W OF NAISSAAR ISLAND FIRING PRACTICE AREA 2A CENTRED 59-35N 024-19E FIRING EXERCISES IO PROGRESS OTHER VESSELS MUST AVOID ENTRY INTO THE AREA STANDING BY VHF CH 13 AND 61 CANCEL 081301 UTC SEP. NNNN