Navigation chart updating kit
Channel tabulations, depth legends, depth notes, and chartlets may not be included in chart update listings prior to January 2000, due to ongoing development of CRIT throughout the 1990s. The user agrees not to copy or distribute the chart updates from this web site, nor to send the chart updates from this web site to any other server or location for further reproduction or distribution, unless the following conditions are followed: a) the NOAA Chart Update Disclaimer in its entirety is displayed to anyone who accesses the chart updates, and b) a reference to the NOAA Chart Update web site is included so that anyone accessing the chart updates is advised of where they originated. The user acknowledges that should these chart updates be incorporated into any other product in a form other than as provided by the NOAA Chart Update web site, the producer of that product assumes full liability. The user acknowledges that information provided by the NOAA Chart Update web site is intended as a tool for the convenient updating of nautical charts, but it must not be used as a substitute for the United States Coast Guard, National Imagery & Mapping Agency or Canadian Coast Guard Notice to Mariner publications. The user acknowledges that certain information, such as temporary changes to aids to navigation, special published announcements and other important information affecting navigational safety, are not available on the NOAA Chart Update web site.By clicking on the link below to proceed to the NOAA Chart Update Web Site Data Search, the user acknowledges that they have read and agree to the above terms and conditions.
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The NGA NM, for the most part, contains the same information published in the USCG LNM.
However, the NGA NM is primarily intended for deep ocean vessels and typically does not carry LNM chart updates that affect waters shallower than 18 feet. and Canadian charts overlap, the Canadian Coast Guard’s Notice to Mariners will sometimes contain unique information not found in the USCG LNM.
If the mariner chooses to purchase a POD chart, all updates that have been published in the one year between the new edition date and the purchase date have already been applied.
NOAA cartographers maintain a master electronic copy of every new chart edition.
Software is available to apply the update patch to the base version of the raster chart.