ZCZC FA04 100500 UTC AUG ESTONIAN M_Y_M ETUHO_G_CS.+.2-131700 UTC AUG 140500-141700 UTC AUG NE OF OSMUSSAAR ISLAND _SYING 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 141700 UTC AUG NNNN