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Old 11-06-2006, 01:30 PM   #2  
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Joined APC: Oct 2005
Position: Executive Transport Driver
Posts: 3,047

Originally Posted by Illini View Post
Anybody know anything about the differences? I have to figure out the general area when flights from Boston and New York Area transition from Class I navigation to Class II along the eastern seaboard. Also, at what point in South American do flight transition to Class I from Class II. I know that there is no definite answer because of reroutes and the multiple flight plans available for these flights but there must be a way to figure out a box where this takes place.

All help is greatly appreciated

Class II navigation (as defined by the FAA):

is any en route flight operation or portion of a flight operation that is not Class I navigation.
Gee that helps... It goes on:

Any operation or portion of an en route operation is Class II
navigation if it takes place outside the officially designated
operational service volumes of International Civil Aviation
Organization (ICAO) standard ground-based navigational
aids (NAVAIDs), such as VHF omni-directional range
(VOR), VOR/distance measuring equipment (DME), and
non-directional beacon (NDB). Class II navigation is
dependent on the use of a Long Range Navigation System

(LRNS). An LRNS may be satellite-based (e.g., Global
Positioning System (GPS)), self contained (e.g., Inertial
Reference System (IRS)), or referenced to ground stations
(e.g., LORAN-C).
It's much easier to simply define class II navigation than it is to define class I nav... That being the case, it's just easier to send you to the appropriate documents on the FAA website for you to look over:

Class I navigation info:

Class II navigation info:
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