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
Maria Marten, or the Mystery of the Red Barn British Film Institute's "75 Most Wanted" lost films. Maria Marten, or the Mystery of the Red Barn Maria Marten, or the Mystery of the Red Barn is a 1913 British silent drama film directed by Maurice Elvey. It was based on the 1827 Red Barn Murder. A Suffolk squire murders a young pregnant woman who had demanded that he marry her. The story of "Maria Marten" was a popular stage melodrama of the Victorian era, and five films based on the story were made between 1902 and 1935. As of August 2010, the film is missing from the BFI National