ZCZC JA29 251818 UTC MAR KALINGRAD NAV WARN 053/26 SOUTHEASTERN BALTIC SHIPS EXERCISES 312100 UTC MAR THRU 302100 UTC APR 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 MESSAGE 302200 UTC APR NNNN