"The design of the British version, the Chariot, was derived from salvaged Maiales."
That's why it looks similar. The fact that it's the actual picture from the Italian war page that I posted, supports the fact that it's the Italian version.
But it was the Italian 10th Light Flotilla, formed in 1940, that would perfect this deadly new weapon.
The 10th Light Flotilla was responsible for 28 ships sunk or damaged in World War Two. These ships include the battleships HMS Queen Elizabeth, HMS Valiant, cruiser HMS York and 111, 527 tons of merchant shipping.
I figured when it had AAP in the title it was about burnando then I saw you were looking for a ship name but I don't think the SS Fudgepacker is a registered name