Japanese manned kaiten suicide torpedoes were not launched from torpedo tubes because they were too large. They were lashed to the external deck of the submarine and launched from there.
When Slade Wilson's army were on the bridge, several banners could be seen hanging from lampposts advertising Major League Soccer's Vancouver Whitecaps franchise.
(at around 8 mins) Sebastian Blood receives a call on the landline from Slade. As the phone conversation ends, when Blood hangs up, a close-up of the back of the phone shows that the A/C input cable is there but the phone line is not, showing an empty socket.