| DEs had a highly developed tactical control system known as a combat information center (CIC). This was an area abaft the bridge and under the flying bridge that received, evaluated and plotted on a universal drafting machine (DRT) all information from sonar, radar, bridge, lookouts, radio, semaphore flags or signal lights, and anything else pertinent. It then fed data and recommendations to the captain on the flying bridge to assist him in his decisions. The CIC was generally, but not always, under the immediate supervision of the executive officer. The value of the CIC in the destruction of enemy submarines was considerable.
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