TheCodeBreakers
u." Keywords changed often but not daily. Three or four staffers
specialized in this; they became so adept that they usually managed not
only to restore the scrambled codewords to their original form but even to
recover the keyword for the transposition tableau. The solutions greatly
assisted British operations, and eventually the Germans could no longer
chalk off as coincidental the repeated apparitions of substantial British
units athwart their course. In August of 1916, they changed their code.
But Room 40's direction-finding and call-sign sections were so well oiled
that they nevertheless maintained a fair flow of intelligence. More help
came from divers who recovered codes from sunken U-boats.
These finds helped the cryptanalysts in reading the increasing volume
of enemy messages. Room 40 was now approaching the height of its
power. Intercepts poured in through the pneumatic tube so fast that at
annaabi.ee 
