The images of the burning of the fictitious liner Wentworth Castle is taken from actual news footage of the burning of the liner SS Morro Castle. The Morro Castle caught fire on 8 September 1934 during a trip from Havana to New York. The heavy loss of life combined with the beaching of the gutted hulk in New Jersey made it one of the biggest news stories of the day.
In the Tong room scene with Wong, it's obvious that all of the scene, except the "Wentworth Castle" dialogue, was re-used from a previous Wong movie. The most notable clue is the Tong leader changing appearance between shots.
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