Docks? How many FFs have docks near the beginning. I would imagine if you played 6 you'd remember. What with the opening march through the dark and moody snow feild in mecha armor. 4 starts out with you on the deck of an airship in a fleet of airships after a raid. You say it was on PS1? I don't remember FF5... but that's an option. Certainly wasn't CT, you can see the enemies in there. And I think everyone's in agreement its not 7+ and anything before 4 wasn't released on PS1. So it's FF4-6...

Edit: Oops. Forgot origins... So I guess it coulda been 1 or 2...