Schenk, if you have more details about the bomber lost during the last Gardening operation on 4/5 Oct 1944, I will be interested.
On a related subject, I found on a German forum a list of ships sunk in the Donau due to war causes, and a good part of them were sunk by mines. The list is available at
http://f24.parsimony.net/forum56651/messages/2382.htm.