A paper on what this operation was, for where it took place and historical information related to this operation.
Here you can see a pretty accurate map of the known scuttle locations based on the information I've managed to collect.
List of U-boat scuttled
94 conventional German U-boats were scuttled during Operation Deadlight, they were of types IID, VII, IXC and IXD.
The 22 Elektro boats that became victims to this operation. 4 of the larger type XXI.
Did you know that the British government has awarded a salvage contract for these boats? So you might see them raised from the water bed in the near future, but then again, you might not.
Article published on 7 Nov 2010
Mr. Derek Waller has written a very comprehensive article about the Operation Deadlight.