🔍 Key Concepts

• Notices to Mariners (NTMs) and how they are used for chart corrections • The purpose of a Summary of Corrections vs. other correction media • Which publications are official USCG/NOAA/NGA correction sources and which are not

💭 Think About

• Ask yourself: Which of these options is NOT a standard, formal vehicle used regularly by hydrographic or government agencies to publish chart corrections? • Which item in the list sounds more like an internal or local tool, rather than a widely distributed official publication? • Which of these have you actually seen referenced in the front of a chart or in correction records at sea?

✅ Before You Answer

• Verify which items are actual, named publications regularly issued by the Coast Guard, NOAA, or NGA. • Check your memory of chart legend notes: which types of notices do they tell you to use for keeping charts up to date? • Confirm whether the odd-sounding choice appears in standard exam lists of "sources of chart correction information."