A recent Thread on the Hisse Et Oh forum, I salute by the way, I challenged the accuracy of the chart data provided on the electronic charts. The subject concerns the observation that, in some location, existing information on the Navionics Marine HD application, or on some chartplotters, are missing on Navionics charts available on the website x-traverse.com used with iNavX (and MacENC). Quote :
"So the question is : Is there a difference between the 46XG map and the Europe map or is the difference due to the software that makes the cards tick?. ”
Damned ! It seemed useful to make comparisons closing electronic charts from various sources. As far as I know particularly well geographic location used in example, since it is the approach to the port of Concarneau, near the beacon tower Le Cochon, passage I borrowed hundreds of times over the years I was working with Glenans Nautical Centre. Read more …


In its newsletter of 22 October 2013, theOffice of Coast Survey, Department of NOAA (


As part of its policy aimed at offering users an ever more efficient and safe waterway, public institution Waterways of France (VNF) embarked on the production of electronic navigational charts on various inland waterways. The first two : the “Dunkerque-Escaut” and “La Garonne” connection are published.