The development of IT technology has brought many changes in military operations. For example, the way of transmitting and receiving information from one another has changed. Partiicularly, in the case of the ROK Navy, they utilize encrypted real-time chattig over wireㆍwireless network in operations and tranings. However, text communication is being utilized more in exanging of simple informations, and not for the partical informations required in the operations and exercises, doctrines and

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... ebooks are still being used in these cases. Therefore, I have designed a rule-based engine which can provide real-time informations by linking ECA rules to text communication, and it has been verified by running virtual scenarios. As a rusult, this engine showed an accuracy of 83% . ▸Keywords : rule-based engine, ECA rule, IDEF0