So one of the fundamental design elements of a electronic chart display information system(Ecdis) or warfare Ecdis is the use of the safety depth contour. Anyt

So one of the fundamental design elements of a electronic chart display information system(Ecdis) or warfare Ecdis is the use of the safety depth contour. Anything inside the blue area would cause alarming on a traditional Ecdis. The bigger issue is the data that is used to navigate on, I could write a very boring blog detailing why th systems work so badly...