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To map the seafloor beginning in the 1940s and 1950s, a new technology called **sonar** was used. Sonar stands for Sound Navigation and Ranging. Here's how it works:
1. **Sonar technology**:
- Sonar uses sound waves to determine the depth and contours of the ocean floor.
- A sound signal is sent from a ship to the ocean floor.
- The time it takes for the signal to bounce back to the ship is measured.
- By calculating the time taken for the sound wave to return, scientists can map out the seafloor's features and depths.
2. **Significance**:
- Sonar revolutionized our understanding of the ocean floor by providing detailed maps of underwater landscapes.
- It helped scientists discover undersea mountain ranges, deep ocean trenches, and mid-ocean ridges.
So, in summary, the new technology used to map the seafloor in the 1940s and 1950s was sonar, which used sound waves to create detailed maps of the ocean floor.
