The 451, 551, 556 and 750 all now come with UK and Ireland charts pre-programmed (proper Bluechart ones, not the worlwide basemap). So this frees up the SD card slot for transfering waypoints and routes between your boat and your laptop, the planning software is free if you buy from us. You can also get the full charts on your PC.
You would be able to look at your previous day's track, average speeds etc. Then plan the next day and save it all to a card that your chartplotter uses during the passages.