ZCZC FA87 090708 UTC AUG ESTONIAN NAV WARN 125/26 GULF OF FINLAND. 120700 - 121300 UTC AUG NE OF OSMUSSAAR ISLAND FIRING PRACTICE AREA 1A CENTRED 59-22N 023-33E FIRING EXERCISES IN PROGRESS. OTHER VESSELS MUST AVOID ENTRY INTO THE AREA. STANDING BY VHF CH 16 AND 61. CANCEL WARN 121300 UTC AUG. NNNN