[Kaleu_Mihoo]

now that's a really amazing story! The sad story I can tell you is, after the surreder of Poland in 1939, a colleague of my grandfather managed to escape to Great Britain and become a navigator in the polish 305 bomber sqadron. Their Wellington was badly damaged over Bremen by a nightfighter and they were forced to ditch in the north sea. The entire crew was M.I.A.
Back to topic: Wiki says " the dock was severely damaged and rendered unusable until 1947." so you don't need to disable the whole port.
greets
mihoo