ZCZC JA97 252308 UTC APR KALININGRAD NAV WARN 084/26 SOUTHEASTERN BALTIC SHIPS EXERCISES 302100 UTC APR- 312100 UTC MAY IN AREA TEMPORARILY DANGEROUS TO SHIPPING BR-161 55-09.50N 019-45.30E 55-09.50N 020-00.00E 55-02.00N 020-00.00E 55-02.00N 019-39.60E CANCEL THIS MSG 312200 UTC MAY NNNN