There are nods throughout this movie that the sharks' den is the wreck of R.M.S. Titanic. However, the outside and interiors of the shipwreck were based on S.S. Normandie, a French ocean liner of the 1930s. Particular examples are, the scenes at the bar, when Don Lino and Sykes meet for the first time, and the dining room, where the sitting is set.