sentences:  "U-309" left Germany on 30 January 1945, sailing to Horten Naval Base in Norway, arriving there on 2 February.She departed on 8 February, and headed into the waters east of Scotland.There, on 16 February 1945, "U-309" was shadowing Convoy WN-74 into the Moray Firth when she was detected by the Canadian with ASDIC (sonar).