If you use the popular Navionics charts on your chart plotter, iPad, smartphone or web app (see for yourself here) you may notice highly inaccurate depths and spurious features such as non-existent rocks and buoys. This refers to their “normal” cartography, not the “sonar” version which is crowd-sourced from user-supplied depths and shows even more bizarre … Continue reading Beware inaccurate Navionics charts of Medway