The Hunt for Red October (film) essentially revealed the use of gravimetry as a method of silent navigation in US submarines. Thought to be a billion dollar black project, the development of a full-tensor gravity gradiometer by Bell Aerospace was a classified technology at the time. It was thought to be deployed on only a few s after it was first developed in 1973. Bell Aerospace later sold the technology to Bell Geospace for oil exploration purposes. The last Typhoon-class submarine was officially laid down in 1986, under the name "TK-210", but according to sources was never finished and scrapped in 1990. The musical score of
The Hunt for Red October (film) participated in the Pacific Fleet-supported filming. The crew of "Houston" called their month-long filming schedule the "Hunt for Red Ops." "Houston" made more than 40 emergency surfacing "blows" for rehearsal and for the cameras. Baldwin was approached in December 1988, but was not told for what role. Klaus Maria Brandauer was cast as Soviet sub commander Marko Ramius but two weeks into filming he quit due to a prior commitment. The producers faxed the script to Sean Connery who, at first, declined because the script seemed implausible in portraying the Soviet Union as an ambitious naval power. He was missing