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.