Ploughing waves, warships gallop. Recently, a destroyer detachment of the Navy formed a fleet and went to a certain sea area to carry out practical offensive and defensive exercises. Deep in the ocean, the rapid battle alarm sounded suddenly. The officers and men rushed to the battle position fully armed, and the ships of the formation quickly launched reconnaissance and search. The drilling sea area is filled with thick fog, making the search more difficult. The officers and men stared at the screen, never letting go of any clues. "Water target found!" The radar detection position of a ship reported "enemy information". After analysis and judgment, the formation commander made up his mind to attack. "Fire!" Many shells roared towards the target, and the artillery fire immediately turned the sea and air red. Just after the sea battle, the sonar soldiers of a ship participating in the training reported that they had found "enemy" submarines. The commander responded calmly, the ship formation quickly maneuvered and evaded, formed a submarine attack formation, and launched rocket deep shells to strike the target sea area. Then, the formation headed for the target sea area and surrounded the "black shark" like a big net. After a battle of wits and courage, the sonar parts of each ship cooperated closely and successfully locked the target. Immediately, the participating ships launched a torpedo attack on the target and hit the "black shark" in one fell swoop. In this exercise, the formation has successively completed a number of actual combat courses, such as sea assault, submarine attack and air defense and antimissile, and honed its ability of organization and command, tactical application and coordination. (outlook new era)