Answer:The German U-boat changed the rules of naval warfare because it remained hidden and fired without warning.
Explanation:
During World War I and World War II, German U-boats, or submarines, were known for their ability to submerge and operate stealthily. They often attacked enemy ships without warning, contributing to a significant change in naval warfare tactics. This strategy of surprise attacks without surfacing before firing torpedoes added a new element of unpredictability to maritime conflicts. It made it challenging for enemy ships to anticipate and defend against submarine attacks, marking a shift in the traditional rules of naval engagement.
