The album Tubular Bells (with The Exorcist theme) accidentally contains morse code sent to UK military submarine

Mike Oldfield recorded the classic Tubular Bells in the early 1970s at Richard Branson's studio in Shipton-on-Cherwell, England. About an hour away from there was a huge wireless transmitter called Rugby Radio where, among other broadcasts, the UK government delivered very-low-frequency (VLF) transmissions to submarines. — Read the rest