John Rothman, who plays the Aurora Executive Officer, wears a name badge marked "J.J. Gordon". This is the name of the film's dialog coach, who also played the bearded "Officer Four" seen in the Russian naval headquarters sequences.
The United States Navy categorically denies that any U.S. submarine collided with the Russian Yankee submarine (K-219) or that the Navy had anything to do with the cause of the casualty that resulted in the loss of the Russian Yankee submarine.
Captain Britanov filed a suit in 2001, claiming that Warner Bros. did not seek or receive his permission to use his story or his character for a movie. He also claimed that the movie did not portray the events accurately and made him look incompetent. In September 2004, a court ruled in Britanov's favor. Captain Britanov declines to state the amount of the award; descriptions range from "substantial damages" down to tens of thousands of dollars.
When the Soviet submarine performs its missile targeting routine, the first city locked onto is said to be Washington, but the city indicated by the computer is actually Wilmington, Delaware.