The trawler-assistance vessel is mainly used to assist trawler fishing vessels in conducting fishing operations. Its core function is to work in coordination with the main trawler fishing vessel to tow the fishing nets, maintaining a constant distance and sailing in unison to keep the nets stable underwater and thereby enhancing the fishing efficiency. In some scenarios, it also cooperates with sonar equipment to target fish schools, ensuring the nets accurately catch the target fish species. At the same time, this vessel can travel between the mother ship and the port, the supply ship, completing personnel transfer and the connection and replenishment of supplies such as fresh water, food, fishing gear accessories, and can handle emergencies such as crew members falling into the water or ship malfunctions, assuming the responsibility of an emergency evacuation vehicle, providing comprehensive operational support, logistical support and safety protection for trawling fishing operations.