ZCZC FA75 110506 UTC APR ESTONIAN NAV WARN 041/26 NORTHERN BALTIC SEA. 14 - 17 APR MINEHUNTING OPERATION SW OF SORVE PS IN AREA BOUNDED BY: 57-57.2N 021-34.2E 57-58.2N 021-53.4E 57-52.1N 021-58.4E 57-45.1N 021-55.1E 57-49.9N 021-29.3E KEEP SAFE DISTANCE FROM NAVAL SHIPS 05 NM. CANCEL 172100 UTC APR. NNNN