How often are Notice to Mariners updates published?

• A. Anchorage area
• B. Weekly updates published
• C. Indicate features like rocks, wrecks, cables
• D. Updates on changes to charts

Answer: (B)

Notice to Mariners updates follow a weekly cadence. This means new corrections and information about navigational charts are published every week, so mariners can keep chart data current between full chart editions. These updates can include changes to hazards, aids to navigation, wrecks, cables, and other chart details, all aimed at keeping your navigation safe and accurate. The other ideas describe what NtMs might cover (like specific features or changes to charts) or the general purpose, but they don’t address how often the notices are issued.