ZCZC FA98 230700 UTC AUG ESTONIAN NAV WARN 136/2026. GULF OF FINLAND. 260700-261300 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 261300 UTC AUG. NNNN