ZCZC FA49 241311 UTC SEP ESTONIAN NAV WARN 160/26 GULF OF FINLAND. UNDERWATER SURVEY BY VESSEL EVA-316 W OF VAINDLOO ISLAND: 59-51.8N 025-52.7E 59-51.6N 025-58.1E 59-51.8N 026-00.2E 59-50.1N 026-00.4E 59-50.1N 026-07.0E 59-49.0N 026-05.4E 59-49.0N 026-00.1E 59-50.0N 025-57.0E 59-46.5N 025-56.9E 59-46.7N 025-44.9E 59-50.1N 025-46.2E 59-50.1N 025-52.7E AND IN PSN: 59-49.7N 025-36.4E 59-49.3N 025-36.4E 59-49.3N 025-35.6E 59-49.7N 025-35.6E KEEP DIST 2 NM FROM WORKING VESSEL. CANCEL 302100 UTC SEP. NNNN