ZCZC FA31 130738 UTC SEP ESTONIAN NAV WARN 150/26 GULF OF FINLAND. 160700 - 161300 UTC SEP 170800 - 171400 UTC SEP 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 WARN 171400 UTC SEP. NNNN