Which government office produces official nautical charts?

• A. Coast Guard
• B. NOAA
• C. Maritime Administration
• D. Hydrographic Office

Answer: (D)

A hydrographic office is the government body charged with surveying the seas and turning that data into official navigational charts. This office collects depths, tides, currents, and hazards, then compiles and distributes charts that mariners rely on for safe passage. Historically, the United States Navy’s Hydrographic Office was the agency responsible for producing these official nautical charts, which is why this choice is considered correct in many training contexts. While today NOAA’s Office of Coast Survey handles the civilian chart products, the Hydrographic Office name is the longstanding designation tied to chart production and is the best fit for this item in many exam settings.