Visible crew/equipment: When Paul Newman takes Julie Andrews up a small hill to explain that he is not going to work for East Germany you can see a shot from a distance. It is clear that this scene was done in a studio, as you can see several lights above the blue background (which is supposed to be the blue sky).
Visible crew/equipment: When the submarine is below the Queen Mary and the ship starts moving forward you can see a human hand holding the stern of the submarine as it is tossed around by the propellers.