Trieste (submarine)
From Tardis Wiki, the free Doctor Who reference
The Trieste was an Italian submarine sent to the Mariana Trench in 1960. It was the first successful manned attempt (after the failure of the Guernica) and would be the last manned submarine for nearly fifty years, with the Octopus Rock going down in 2009. (AUDIO: Submission [+]Loading...["Submission (audio story)"])