What is another word for navigational chart?
Pronunciation: [nˌavɪɡˈe͡ɪʃənə͡l t͡ʃˈɑːt] (IPA) 
A navigational chart is a map or a sea chart that is used by sailors and other mariners to navigate through the sea. It contains information about the water depths, coastal features, landmarks, and other important features on the water. Some synonyms for navigational charts include nautical charts, marine charts, sea charts, hydrographic charts, sailing charts, and ocean charts. These charts are important tools for ensuring the safe navigation of boats and other vessels on the water. They are typically created based on surveys and observations made by government agencies and are regularly updated to account for changes in the environment.
