"God himself could not sink this ship!" (dramatic irony)
This line spoken by Cal Hockley is an example of dramatic irony, because the audience knows that the Titanic will strike an iceberg and sink during its maiden voyage.
"We're the luckiest sons-of-bitches in the world, you know that?" (dramatic irony)
This line spoken by Jack Dawson is another example of dramatic irony because the audience knows that Jack's seemingly lucky break is actually an extraordinarily unlucky development that has consigned him to a doomed vessel.
"Waste of deck space, if you ask me." (dramatic irony)
Cal speaks this line when he, Rose, and Thomas Andrews are strolling along the decks of the Titanic. Rose notes that the ship only has enough lifeboats for half its passengers. The line is ironic because the audience knows that all of the lifeboats will be necessary to save the ship's passengers, most of whom will perish in the disaster.
"Sleep soundly young Rose, for I have built you a good ship, strong and true." (dramatic irony)
Thomas Andrews speaks these lines to Rose after she notices that there are only enough lifeboats for half of the passengers. The line is an example of dramatic irony because the audience knows that the ship will sink, along with most of its passengers. Thomas Andrews later apologizes to Rose for not building her a stronger ship.
Rose dropping the Heart of the Ocean (situational irony)
When the viewer learns that Rose has been in possession of the Heart of the Ocean diamond for the entire film, he or she expects that Rose will turn it over to Brock Lovett, who has spent untold amounts of time and energy desperately hunting for the jewel. Instead, in an example of situational irony, Rose drops the priceless diamond back into the North Atlantic.
