Chapter 14: Return to London Nautica
5:2: In the very first room, go immediately to the right of where you entered and you will find this code piece on top of a cardboard box against the wall.
5:3: After you have returned inside the building from the wooden platforms, enter the first office on the right to find this code piece on the table.
5:4: As soon as you have dealt with the helicopter, go to the far left side of the room and you will find this code piece on a turned over chair.
5:5: When you go down the rubble to the room below the previous code piece, go all the way to the far end of the room to find this on the ground beside the blue tarp.
5:6: Go down one more floor from the previous code, and you will find this one in a filing cabinet at the far end of the room.