USN Tudor Hill, 1954–1995. The US Navy operated a listening post from Tudor Hill, in Southampton, Bermuda from 1954 til the closure of US bases in 1995. This base remotely monitored sensors designed to listen for submarines moving through the Atlantic. There was some hope that the base would survive the end of the Cold War, and the base closures of 1995. It was thought that it might be adapted to scientific purposes, for the monitoring of whales, but it was closed, instead, along with NAS Bermuda, and the NAS Annex.