What would happen if a submarine didnt have any fins?

If a submarine lacked fins, it would struggle with stability and maneuverability underwater. Fins, such as the stern and control surfaces, are crucial for controlling pitch, yaw, and roll, allowing the submarine to navigate effectively. Without them, the submarine would be more susceptible to unwanted movements and could find it difficult to maintain a steady course or ascend and descend properly. Overall, the absence of fins would significantly impair its operational capabilities.