Visible crew/equipment: When Jack and Rose are running away from Cal to the first class dining room, if you look at the glass you can see a black screen, a light, and a crewman.
Visible crew/equipment: When Jack comes to the first class door for the first time in his tux, you can see a cameraman in the glass door before he enters.
Visible crew/equipment: When Rose says her line "Yes, I would like to see my drawing" when she is in her stateroom with Lizzie, the shadow of what appears to be a boom mike (behind her and to the left) can be seen dropping down prior to her line and then going back up afterward.
Visible crew/equipment: In the scene after Jack and Rose try to save the child from the Italian guy, when the water bursts through the doors, they run away from it. But take a close look at Jack's neck: you can see the edge of a black wetsuit. And under his entire shirt, it's a little darker than it is a few moments later when they try to open the gate.
Visible crew/equipment: When Jack and Rose are running from the raging water that is gushing down the hall after them you can see the faces of the stunt doubles through the computer generated ones of Leonardo and Kate.