Personalnavigations might have some near future use in the GPS Industry or satellite tech when easier custom end user solutions are developed for tech challenged people or for transport professionals- an example- like people who need to sail/fly/drive from A to B Via C with a stop at D - some software will automatically personally customise the route to avoid bad weather, low tides, tornados etc. Long term hold. Not bad at all.- Some device or program will eventually do personal navigations for idiots too lazy to fiddle with the GPS too- like voice command:smilewinkgrin: