TheCodeBreakers
Harbor. VaultHke doors protected its secrets; steel-barred gates at the
top and bottom of the stairs kept out visitors; guards stood a round-the-
clock watch. This office was staffed, when the war broke out, with about
30 officers and men. It was equipped with International Business
Machine Corporation tabulators, which were partitioned off in a separate
section because of the racket they made. Its raw material came in by
courier from the radio intercept station at Wailupe. This was the so-
called Combat Intelligence Unit, the radio intelligence organization that
served the Pacific Fleet.
Lieutenant Commander Joseph John Rochefort had commanded it
since May of 1941. Before Pearl Harbor, the bulk of its personnel worked
on interception, direction-finding, and traffic analysis; the unit fed these
results to the fleet intelligence officer. Though one of its young crypt-
analysts, Chief Radioman Farnsley C. Woodward, had attacked the
annaabi.ee 
