What uses sonar waves emitted from a ship to map the oceans floor?

Sonar waves emitted from a ship are used in a technology called "sonar" (Sound Navigation and Ranging) to map the ocean floor. This technique involves sending acoustic signals (sonar pulses) into the water, which bounce off the seabed and return to the ship. By measuring the time it takes for the echoes to return, the depth and topography of the ocean floor can be determined. This method is essential for various applications, including navigation, marine research, and underwater exploration.