Departing from the dock: The captain should determine the method of departure based on the effects of wind direction, wind force, current speed, and current direction, as well as the water depth around the dock and the ship's mooring conditions, and inform the duty personnel; all duty personnel and those operating on deck must wear life jackets; unnecessary ropes and obstacles outside the ship's hull should be secured; pay attention to the dock, berth, surrounding environment, ships ahead and astern, and the dynamics of passing ships. Only when there is no obstruction to other ships' navigation can the ship proceed, and the departure signal should be sounded according to regulations. After obtaining the consent of the tugboat, the engine can be operated; when a single ship departs from the dock in a river section with a current, under normal circumstances, the bow and stern lines can be cast off according to the direction of the current. When the bow or stern forms an angle with the current, all lines can be cast off, and the engine can be used to leave the dock.
 
In areas with calm currents, the stern can be pushed away using bamboo poles first, and the engine can be started after sufficient water depth is ensured. In situations where the fore and aft fenders of a twin-screw vessel are tight, the rudders of both engines can be used in coordination to move laterally away from the berth; when departing from the dock, the engine should not be used too forcefully, and the rudder should not be used too early. Small rudder angles are needed to prevent the stern from sweeping the dock or other moored vessels; when a tugboat departs from the dock, the tugboat should first be notified to cast off the shore lines. After hearing the tugboat's signal, the tugboat should then cast off the head lines, proceed slowly, and gradually use small rudder angles to steer the ship outwards. A crew member should be assigned to the stern to monitor the ship's dynamics and direct the tugboat to operate the outer rudder. When the ship is ready to dock or there is no obstruction to other vessels, the speed should be gradually increased.