31.   A satellite navigation system is optional and features touch-screen controls for navigation as well as for adjustments to the climate and audio systems.

32.   A slew of luxury cars are being outfitted with navigation systems, as either standard equipment or options.

33.   A White House order that recently gave civilian GPS users access to high accuracy signals has fueled rumors that the Pentagon is building a new military navigation system.

34.   Airplanes and speedboats rendezvous on schedule for airdrops of cocaine, thanks to state-of-the-art navigation systems that pinpoint a meeting place.

35.   All automakers are trying to come up with navigation systems that are easy to use.

36.   But Philips navigation systems in the United States offer no extra features, because of concern about liability, Payer said.

37.   But Pioneer is trying to compensate by entering new businesses, including digital video disk players, car navigation systems, cable modems and digital satellite television receivers.

38.   But wide-screen television is one of several potentially profitable new products, along with the mini-disk audio system and the car navigation system.

39.   Buttons and dials perform more functions, and because radios must share dashboard space with other devices, including satellite navigation systems, they have gotten smaller as well.

40.   By comparing successive radar measurements, the navigation system identifies stationary and moving objects in the vicinity.