The purpose of this study was to propose an operational concept for a ship in a fleet equipped with an interceptor missile system, a naval surface to air defense system, and to develop a simulation program that reflects it. The results of the defense activities of other ships in the fleet can be reflected by receiving information about the status of the enemy missiles. The allocation of defensive assets is based on the survival probability of the ship, not on the destruction of enemy attacks, which can be obtained as the product of the expected survival probability for each enemy missile. In addition, the concept of predicted survivability was introduced to assess the loss of future defense opportunities that would result from assigning a new command. A simulation program was also developed as a tool for realizing the proposed concept of operations, which generated cases.

The most important role of air defense system is to attack the air target of enemy to defend the important military unit or facilities. In order to attack the target as soon as it is detected, fast and precise fire signal transfer using the fire control stick is very important. However, it was found that firing is not conducted in the test for fire control stick. In order to find the reason of such problem and improve life cycle of fire control stick, the test was conducted and it was found that chattering occurred and this led to malfunction of signal transfer from control stick to fire control unit of air defense system. In order to draw resolution for this problem, two contact plate made of beryllium copper is suggested to add to the control stick to enhance the contact and reduce chattering effect. The four fire switch prototypes were tested for 100,000 times and it showed its reliability of use.

In case vehicle system has low travel distance and short duration of engine operation, this can be relatively susceptible to engine scuffing related problem. Users also experience inconvenience in system maintenance that they have to manually start engine periodically in cold night during winter. In order to solve such problems and improve system's life cycle, the automatic engine start system is developed. In order to develop the automatic engine start sytem for air defense system BIHO, two types of engine start sytem and the engine sub system are studied and four steps to start and control the automatic engine start system is suggested. The prototype of automatic engine start system was tested for the single assembly and vehicle-installed test and all requirement of the system was madeto prove its possible application.

Air Defense System requires fast movement of the turret to detect and attack the flying target of enemy. In order for the air defense system to operate accurately and properly, it is necessary to optimize the design of the motor brake system. The air defense system that is not designed properly has possibility of low performance of the gun turret and environment of operators. The previous air defense system had such flaw in its design and it caused much noise and current in the operation of the turret. In order to resolve this flaw, we changed the position and design of the components of the motor brake system to reduce load and achieved the 62.5% reduced current and 40% reduced noise of the motor brake system compared to the previous design.