X-Crafts attacked the Tirpitz on KaaFjord ( Alta ) and out of 3 midget sub's ( X-5, 6 and 7 ) only X-5 fate is unknown and the sub never found yet together with his crew.
One charge recently found could be of X-5.
The attack occurred on September 22nd, 1943.
Tirpitz wreck is in Tromso ( not in KaaFjord - Alta ) so a different city and a different anchor place the last one the battleship was moved on October 1944.
Tirpitz sunk on November 12th, 1944.
Just for the record.