TheCodeBreakers
foreign communications to them. Consequently, 95 per cent of the
intercepts were radio messages. The remainder was split between cable
intercepts and photographs of messages on file at a few cooperative cable
offices.
To pluck the messages from the airwaves, the Navy relied mainly on
its listening posts at Bainbridge Island in Puget Sound; Winter Harbor,
Maine; Cheltenham, Maryland; Heeia, Oahu; and Corregidor and to a
lesser degree on stations at Guam; Imperial Beach, California;
Amagansett, Long Island and Jupiter, Florida. Each station was assigned
certain frequencies to cover. Bainbridge Island, which was called Station
S, copied solid the schedule of Japanese government messages between
Tokyo and San Francisco. Its two sound recorders guarded the
radiotelephone band of that circuit; presumably it was equipped to
unscramble the relatively simple sound inversion that then provided
privacy from casual eavesdropping. Diplomatic messages were
annaabi.ee 
