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…