But why did your sources state there were 2 attacks on U-480 when there was clearly only 1?I checked my sources BD. ENDIT.
And your ambush minefield claim is also incorrect.
How did the RN know that U-480 was headed towards that exact spot?
Because if they knew U-480's position then they would hunt it with ASW ships and planes, not plant a minefield.
U-480 simply blundered into a random minefield while looking for targets of Portsmouth.
There was no ambush involved and the RN did not know where U-480 was homeported, otherwise it would have destroyed U-480 as it left the harbor in Norway.
And thus, this is proof that the Alberich system was a success, as long the the glue kept the tiles on the sub.