Maybe the torpedo came from this WW2 episode?
RHS Proussa
Torpedo boat of the Kidoniai class
Navy: The Royal Hellenic Navy
Type: Torpedo boat
Class: Kidoniai
History: Sunk off Corfu by Italian aircraft.
Noteable events involving Proussa include:
4 Apr, 1941
The TB was riding at anchor in Dafnila Bay, Corfu island, NW Greece, when she was attacked and sunk, along with the Greek steamer Sussanna by Italian Ju-87s belonging to the 239th Sqn, 97th Dive-bombing group (Captain Mario Larket).That air group carried out 3 attacks that day, each with 6 machines, against Greek naval vessels. Germany did not enter the fray against Greece until 6 April, therefore the notion German planes made this attack is patently incorrect.