DANAC  stands for Decca Area Navigation Airborne Computer. In this system, the position-fix information delivered by a Decca Navigator receiver is continuously presented, via the computer, on a Flight Log pictorial display.The system is largely automatic, but permits the userto monitor all stages of operation. A basic principle is that the computer, during initial setting-up and under certain other conditions, requests the user to confirm that he accepts the displayed position of the aircraft. If the position is not acceptable he can adjust the display using the prescribed procedures.

A complete  desription can be found in the DANAC (Issue 3) Operations Manual.

REFERENCE:

DANAC Operations Manual  Issue 3.
 
 

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