For your information its still the number one communication platform for inland shipping in the Netherlands :) Since the coverage of terrestrial tv requires the first three public channels to be accessible for free any one can get this information using DVB-T receiver and read it. The coverage is quite a bit better than 4G as well.

Plus we have a smartphone app and website to view it on too :). http://nos.nl/teletekst#721 -> Notice to skipper information.