送交者: 唐好色 于 2007-03-12, 23:56:13:
回答: passenger flights have navigation system. Even today, 由 steven 于 2007-03-12, 10:00:12:
Curious, why aren't the commercial jets allowed to use GPS? I mean, install the conventional navigational system, but what's wrong with having GPS there in parallel? If I were to design the system, I will use the GPS as the primary system and the old navigation system as backup.