thanks the8march, interesting Image. It reminded me to Sejil missile, like Sejil actuator boxes of jet vanes have been installed on outer surface of body of missile that i think it is due to large diameter of nozzle of engine compared to diameter of body unlike Shahab-3/Ghadr missile:
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By considering the jet vanes of Unha-3 is it possible to conclude first stage just uses one engine and one nozzle? or I'm wrong. because I think the jet vanes should be located around the nozzles so If four jet vanes have been located around outer diameter of body of Unha-3 so it means has just one nozzle and engine.
Is my assumption true or I'm wrong and even in rockets with multiple nozzles, the jet vanes are lcoated and installed just on outer diameter of body too?