NOAA makes free PDF charts permanent product

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The following is the text of a news release from the National Oceanic and Atmospheric Administration's Office of Coast Survey:

(WASHINGTON) — After a three-month trial period, PDF versions of NOAA nautical charts will become a permanent product, free to the public. The free PDFs, which are digital images of traditional nautical charts, are especially valued by recreational boaters who use them to plan sailing routes and fishing trips.
The free PDF charts are part of a suite of new and enhanced navigational products designed to make NOAA's data more accessible to the general public.
"Up to date charts help boaters avoid groundings and other dangers to navigation, so our aim is to get charts into the hands of as many boaters as we can," said Rear Admiral Gerd Glang, director of NOAA's Office of Coast Survey. "Within about 90 days of the product's beta release, people had downloaded nearly 2.3 million charts. To us, that represents over two million opportunities to avoid an accident at sea."
To help boaters who aren't sure which chart they need, NOAA has launched a new interactive chart locator that allows people to select a chart from a map of the U.S. and choose their format. Whether downloading one of the new PDF nautical charts, selecting a chart to order from a "print-on-demand" vendor, or finding an electronic chart, the interactive catalog presents a highly integrated suite of navigation products.

NOAA is also making available for free the NOAA ENC Online, a new webmap showing the features included on NOAA electronic navigational charts (NOAA ENC). The map allows users to see chart data that was previously only available to users who purchased specialized viewing systems.  
Another change is upgrading image resolution, from 254 dots per inch (DPI) to 400 DPI, of NOAA's digital charts. The change improves image quality and legibility of the raster navigational charts (NOAA RNC) that are used in chart display systems. Coast Survey asked users how the changes affected chart appearances on mobile apps, and initial compatibility issues and discrepancies that were identified have been resolved. The suite of RNCs will be upgraded starting April 3.
The changes are part of a systematic reconstruction of NOAA's nautical products, anticipating mariner needs as navigation transitions to a new digital age. Earlier, NOAA announced the privatization of chart printing and distribution, with NOAA-certified vendors providing improved paper "print-on-demand" (POD) charts.  
NOTE: Printing PDFs may alter the chart scale, color, or legibility that may impact suitability for navigation. Printed charts provided by NOAA-certified POD providers fulfill a vessel's requirement to carry a navigational chart "published by the the National Ocean Service" in accordance with federal regulations. 

By Professional Mariner Staff