ZCZC JA78 200600 UTC APR POLISH NAV WARN 077/26 SOUTHERN BALTIC. POLISH COAST DUE TO MILITARY EXERCISES ZONE IS CLOSED FOR SHIPPING AND FISHERY: S-6 CENTERED 54-39.27N 016-36.59E BETWEEN 20 APR AND 25 APR FROM 06:00 TO 21:59 ZONE IS CLOSED CANCEL THIS MSG 252159 UTC APR NNNN