We all know that the boarding scenes were reversed in editing because only the exterior of the right side of the ship was built, but the left side was pulled up to the dock for boarding. In the opening sequence we see a young lady leaning over the rail of the ship, looking to the right of the screen and waving vigorously with her left hand. Later we see the same girl in the same posture, but looking to the LEFT and waving with her RIGHT hand. Looks like this snippet of film was used twice, once "flopped" and once not!