To protect itself from enemy aircraft and ships , the o brien carried two five - inch guns and eight 20 - millimeter antiaircraft guns 船长441尺,船宽57尺.因为自卫的需要,此船装备2挺5英寸舰炮, 8挺20mm防空炮
The design was found to be rather cramped , especially for antiaircraft guns in the superstructure , because the length of the superstructure had been reduced 较短的舰身设计后来被证明是不成功的，特别是限制了防空炮在上层建筑的布置。由于上层建筑的长度被缩短，使得防空炮不能很好的发挥火力。
Aim to plan optimal routes for a type of cruise missiles ( cms ) which can avoid the firepower units as surface - to - air missiles , antiaircraft guns , fighter planes , electromagnetism impulse and terrain obstacles and have the shortest length as well as consume the least oil 摘要目的设计优化一类巡航导弹航迹，且航迹满足避开地空导弹、高炮、歼击机群、电磁脉冲等火力单元和地形地物障碍，并且满足航迹路径长度短、耗油量少等约束条件。
It is concluded from the results of air defense operations in the rcent local wars that the air defense system made up of agm ( antiaircraft guns and missle ) is capable of an increased combat effectiveness of the air defense system , and how to carry out effective fire distribution is the key point in it 摘要近期局部战争中的防空作战经验表明：实施弹炮混编可以大大提高防空武器系统的作战效能，而如何实施有效的火力分配又是其中的一个重要环节。
