hydrographer
/haɪˈdrɑɡrəfər/
noun
- A scientist or expert who studies and maps bodies of water, such as oceans, rivers, and lakes.
- As a hydrographer, she spent months charting the coastline of Alaska.
- Our team hired a hydrographer to survey the river's depth for the new bridge.
- The hydrographer used sonar equipment to map the ocean floor.