'Nelke' was a U-boat minelaying operation in the Pechora Sea by Kapitänleutnant Hans Benker’s U-625 (12/27 July 1943).

The boat laid 24 TMB mines on 20 July in the Yugor Strait, and the 557-ton Soviet minesweeping trawler T-904 was lost to one of these mines on 25 July.