At the end of Boat, after shooting down Crow, I'm instructed to collect a PDA. I'm told that I'm going to be picked up, and I see the boat coming forward. It stops infront of the sunken ship, and Doyle stops talking. I can't figure out what to do, am I so supposed to go somewhere? The last objective is to go to the front of the ship, but after trying that I still get the same result. Killing everyone before the boss still had the same effect, what am I missing?