ZCZC FA23 050500 UTC JUL ESTONIAN NAV WARN 97/2026. GULF OF FINLAND. 080600-081400 UTC JUL 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 081400 UTC JUL. NNNN