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Chartlets Depth Tabulations Notes 2025

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The document is the Notice to Mariners No. 51, published on December 18, 2010, by the National Geospatial-Intelligence Agency (NGA) in collaboration with the National Ocean Service and U.S. Coast Guard. It provides essential updates and corrections related to navigational safety for mariners, including chart corrections, navigation publications updates, and warnings about maritime hazards. The document emphasizes the importance of using updated charts and publications for safe navigation and includes contact information for reporting discrepancies or obtaining further assistance.

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What is NtM in maritime?

Notices to Mariners (NtM) are corrections to nautical charts and publications. NtM only contain information which is vitally important to safety at sea. Mariners are obliged to keep their products up-to-date with NtM until a new edition is issued.

What are the sections of the weekly notice to Mariners?

Section No. Title. I. List of Charts Affected. II. Permanent Notices. III. IV. Marine Information. V. VI. Corrections to Sailing Directions. VII. VIII. Corrections to List of Radio Signals. IX. X. Reporting of Navigational Dangers. (PUBLISHED ON NHO WEBSITE ON 1ST 16TH OF EVERY MONTH)

What are the 7 contents of Notice to Mariners?

The Notice consists of a page of Hydrograms listing important items in the Notice, a chart correction section organized by ascending chart number, a product catalog corrections section, a publications correction section, a summary of broadcast navigation warnings, and a page of additional miscellaneous information.

How do I get notice to mariners?

Through the free online subscription service, Gov Delivery, mariners can subscribe to selected topics and receive via email, Broadcast Notice to Mariners (BNM) in their chosen geographical area.

What is the content of mariners Handbook?

The Mariners Handbook includes: Guidance to assist mariners in navigational training and active bridge procedures. Information includes charts and their use, the communication of navigational information, the maritime environment, restrictions to navigation and maritime pollution and conservation.

What are temporary and preliminary notices to mariners?

What are Temporary and Preliminary Notices? Temporary and Preliminary Notices are issued by Hydrographic Offices when the information will only be valid for a short period of time or needs to be promulgated quickly and a normal chart correction would take too long to prepare and distribute.

What is the purpose of the local notice to Mariners?

(a) Local Notice to Mariners reports changes to and deficiencies in aids to navigation that are established or maintained and operated by or under the authority of the Coast Guard, and any other information pertaining to the waterways within each Coast Guard district that is of interest to the mariner.

What is the difference between preliminary temporary and permanent Notices to Mariners?

A Preliminary notice (P-notice) - an activity or condition that will become permanent and will result in a chart revision. A P-notice will always be followed later by a notice of effect. A Temporary notice (T-notice) - conditions that will not become permanent.

Chartlets Depth Tabulations Notes 2025

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