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) the first page which set the story before Gorbachev's coming to power, when the events of the book would have seemed more plausible. He arrived in L.A. on a Friday and was supposed to start filming on Monday but he requested a day to rehearse. Principal photography began on April 3, 1989 with a $30 million budget. The Navy lent the film crew "Houston", , two frigates ( and ), helicopters, and a dry-dock crew. Filmmaker John Milius revised some of the film's script, writing a few speeches for Sean Connery and all of his Russian dialogue. He was asked