ZCZC FA84 180500 UTC APR ESTONIAN NAV WARN 55/202 GULF OF FINLAND 210500-211600 UTC APR 230300-230800 UTC APR NE OF OSMUSSAAR ISLAND FIRING PRACTICE AREA 1A CENTRED 59-22N 023-33E FIRING EXERCISES IN PROGRESS OTHER VESSELS MUST AVOID ENTRY INTO THQMYPONJHWF_MLEM D.__. _,$ 61 CANCEL 230800 UTC APR NNNN