Hello, Mr. Webmaster. I´m a new user, from Buenos Aires, Argentina, and I recently discovered this website, which is really superb! Thank you for it!.
Now, I dare to suggest you, as far as possible, if you can program the ability that allow users to customize our navigation areas, (maybe using layers) to set up (for example) channel indicator buoys, or "isolate danger" buoys, according to the IALA system. This feature will help us very much to take advantage of the possibilities offered by the site to practice.
Thank you very much!
PS: If you need technical data about the River Plate area between Argentina and Uruguay, I can help you as a "zone pilot".
BRTY.