Recently, the Navy Huaibei ships, which are responsible for the normalized combat readiness police patrol mission, have trained in multiple battle positions. The air-to-air department intercepts the "incoming" targets in all airspace and in multiple directions; the sea-to-sea department "attacks" medium and large surface ships at long distances, so as to achieve "strikes are severely damaged"; as the "sweeping ear", the sonar department should adjust the sonar working parameters according to sea conditions to ensure continuous and stable tracking of the targets.