Jules V's List: GPS

The improvement in the performance of Global Positioning Systems (GPS) has made it a popular tool for road navigation. Yet how reliable is it really and how can it be developed into a system robust enough to undertake critical tasks such as air and rail travel? David Bartlett, a freelance consultant on GPS systems, looks at the history of GPS and how it can be combined with other technologies and satellite navigation systems to reach optimal performance.

ll continue to provide the GPS Standard Positioning Service for peaceful civil, commercial and
scientific use on a continuous,

"menus that offer a range of snacks and sandwiches. At breakfast, continental
dishes, along with a handful of egg entrees, are available both in cabins and
suites. Items off the main dining room menu can be ordered at dinner. There is
no charge for room service between 5 a.m. and midnight (though a buck or two
gratuity is recommended); late-night orders incur a $3.95 fee."