To gain more authenticity, the filming and production team has partnered with the US Navy on virtually every aspect of Hunter Killer's design.
One of Michael Nyqvist last films before his death in 2017.
While the Russian Captain Andropov mentions his former trainees, one of the names is Alexei Vostrikov - this is Harrison Ford's character from K-19: The Widowmaker (2002), also a submarine captain.
The Russian submarine is an Akula class. Akula means "shark" in Russian.
The DSRV (Deep Submergence Rescue Vehicle) "Mystic" in this film is the same DSRV from The Hunt for Red October. Operational in 1977 she was retired in 2008 and donated to the Naval Undersea Museum.