hydrographers

/haɪˈdrɑɡrəfərz/
noun
  1. Plural of hydrographer; scientists or experts who study and map bodies of water.
    • Many hydrographers use satellite data to track changes in river flow.
    • The hydrographers presented their findings on rising sea levels at the conference.
    • A group of hydrographers worked together to create a detailed map of the bay.