Heart of the system is the computer based Degaussing Control Unit (DCU), which accommodates the MMI and interfaces to the other main system components. For control and monitoring, standard interfaces are provided.
In automatic mode the DCU receives the actual magnetic earth field data either from the magnetic probe system or by calculations derived from a geophysical model as data base and inputs from the vessels´ navigation system. To this end the DCU is equipped with a suitable memory, which contains the algorithms of the geophysical model for generation of the magnetic earth field data. In emergency mode the navigation data can be input manually.
At any given moment the system automatically calculates the required sum current for each degaussing coil, which is composed of the permanent-, induced- and in it´s maximum configuration also the eddy current content.
On the basis of this calculation each degaussing power amplifier generates the required DC sum current to feed the related connected coil. Menu controlled interactive communication between the user and the DCU is effected via a display with attached keyboard and functional softkeys. Error messages are generated in case specified limits are exceeded, or undesired operational conditions prevail.