A notice to mariners (NtM or NOTMAR) advises mariners of important matters affecting navigational safety, including new hydrographic information, changes in channels and aids to navigation, and other important data. Over 60 countries which produce nautical charts also produce a notice to mariners.
A notice to mariners (NtM or NOTMAR) advises mariners of important matters affecting navigational safety, including new hydrographic information, changes in channels and aids to navigation, and other important data. Over 60 countries which produce nautical charts also produce a notice to mariners.
Source: Wikipedia "Notice to mariners" · CC BY-SA 4.0
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