---
title: What is Notices to Mariners?
description: It is a publication which informs mariners of important navigational safety matters affecting Canadian Waters.
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A ***Notice to Mariners* ** publication informs mariners of important navigational safety matters affecting Canadian Waters.

*Notices to Mariners* are continuous means employed by the Canadian Coast Guard (CCG), to promulgate information required by the master, pilot or person in charge of the navigation of a vessel, as well as other interested parties. The *Notices* *to Mariners* contain the necessary information to ensure that nautical charts, *Sailing Directions*, *List of Lights*, *Annual Edition of Notices to Mariners* and *Radio Aids to Marine Navigation* publications are kept up-to-date. Mariners are also informed of the enactment of regulations and the establishment of procedures governing vessel entry into and transit in Canadian waters.

This electronic publication is published on a monthly basis and can be downloaded from the Notices to Mariners (NOTMAR) Web site [http://www.notmar.gc.ca/](http://www.notmar.gc.ca/). It is prepared jointly with the Canadian Coast Guard (CCG) and the Canadian Hydrographic Services ( CHS ). The information in the *Notice to Mariners* is formatted to simplify the correction of paper charts and navigational publications, which are listed above.

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