ZCZC FA14 280601 UTC AUG ESTONIAN NAV WARN 139/26 GULF OF FINLAND. 310600 - 311300 UTC AUG FIRING PRACTICE AREA 4B CENTRED 59-38.0N 026-22.0E EXERCISE IN PROGRESS. OTHER VESSELS MUST AVOID ENTRY INTO THE AREA. STANDING BY VHF CH 61. CANCEL 311300 UTC AUG. NNNN