v3.1 works best on older MFDs (manufactured between 2012 and 2018). If you have a new display, purchase the modern subscription instead.
If you have acquired a physical SD card for Marine Europe HD v3.1, follow these steps to avoid frustration: Marine Europe HD v3.1 -Navionics-
: Enhanced resolution for tablets (iPads) and high-density smartphone screens. Marine Europe HD v3.1 -Navionics-