Disappointing performance
The device is suitable for the navigation corner below deck, it is unusable outdoors, the monitor reflects unpleasantly in daylight, so the highest brightness must be selected. At night the unlit control buttons cannot be seen (you need a flashlight for the keypad!!!).
Furthermore, there is no option to select ports from a list with the information ETA, DIST, COG.
Even after studying the manual, the representation of the tides is not really comprehensible, let alone intuitive.
My Geonav 4c, which I bought at least 15 years ago, could do ALL of this much better (only retired because Navionics no longer supplies a suitable card)