The proposed study is intended to identify the communication require ments for combat operations on usn surface combatants, and apply the lastest technologies available in the communication industry to develop design recommendations for voice, digitized voice, and display systems, as required, to satisfy the communication requirements. The study will result in 1) specification of combat communication requirements, 2) identification of functional design requirements including the specific communication capabilities and features required to be incorporated in the recommended systems, 3) identification of techniques and equipment resources available from the communiation industry capable of satisfying design requirements, and 4) descriptions of recommended systems and conceptual designs expressed in functional drawings of representative components of the systems.