A Notice to Mariners (NTM) is an official communication issued by maritime authorities to provide navigational information to mariners. These notices serve to inform ship operators, navigators, and other maritime stakeholders about changes or updates that may affect navigation safety. Information included in NTMs may cover a range of topics, such as: 1. **Chart Updates**: Changes to navigational charts, including new hazards, modifications to existing features, or updates on depths and navigational aids.

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