The latest software update (v3) for Lowrance HDS plotters/sounders provides:
"AutoRouting for Navionics* – Platinum, Navionics+ and Navionics Updates Chart users can automatically create the shortest safe route based on selected start and end points using calculations based upon vessel settings and available chart data"
Better still, those who rail against the low selling cost of electronics in North America will be delighted to note that this feature is disabled in that region.