TheCodeBreakers
traffic, talking with many commands to the south, thereby indicating the
probable direction of his advance. Then came a realignment of forces. In
the lingo of the tranalysis people, certain chickens (fleet units) no longer
had their old mothers (fleet commanders). Call-sign NOTA 4, which
usually communicated with OYO 8, now talked mostly with ORU 6.
Accompanying this was a considerable confusion in the routing of
messages, with frequent retransmissions caused by the regrouping:
Admiral z not here; try Second Fleet. Then followed the third phase: radio
silence. The task force was now under way. Messages would be
addressed to it, but none would emanate from it.
During all this, however, not only were no messages heard from the
aircraft carriers, none were sent to them, either. This blank condition
exceeded radio silence, which suppresses traffic in only one direction—
from the mobile force—not in both. American intelligence reasoned that