Navman S100 sat nav saves you petrol

The S100's glide interface could threaten the iPhone's seamless navigating
The S100's glide interface could threaten the iPhone's seamless navigating

Can a sat nav be smarter than a human navigator? Navman thinks so, adding a feature to its new S100 GPS device that it reckons will cut down on the petrol you use.

Smart Economical Routing calculates the most fuel-efficient way to your destination, based on the type of roads and the "number of turns ahead". Navman even claims that using the new system will not "signficantly" increase the time to your arrival.

Mark Harris is Senior Research Director at Gartner.