It was not until World War 1 that the a submarine mountain chain in the central Atlantic was discovered.?

The discovery of the Mid-Atlantic Ridge, a submarine mountain chain in the central Atlantic, occurred during World War I when advances in sonar technology were utilized for naval purposes. As ships began to map the ocean floor to detect enemy submarines, they inadvertently revealed the underwater mountain range. This finding contributed to the understanding of plate tectonics and oceanography, highlighting the dynamic nature of Earth's geological features. The significance of the ridge was further explored in subsequent scientific research, enhancing our knowledge of oceanic processes.