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**Aozenee** · 08-15-2009, 05:07 AM

It's best to wait for the NTSB investigation.

The Hudson corridor is uncontrolled, so certain procedures and visual rules are the responsibility of the pilot. The controller doesn't assign slots in the airspace to all the aircraft and keep them safely separated. But the aircraft are handed off into this space from class-B airspace, which is controlled. In the case of the airplane, it was Teterboro.

The tour helicopters are already within the Hudson corridor.

US airspace is divided into lettered classes. Class-A space is like a high altitude expressway.

Class-B space is the most restrictive that goes to ground level. The tiered "upside down wedding cake" that sits over the airports is a good description.

Philip Greenspun, a pilot who operates tours in Boston and has experience with the Hudson corridor, provides a good analysis. He focuses on the point of entry to the Hudson from Teterboro control (see the NYTimes graphic).

08-15-2009, 05:07 AM	#48
Aozenee Join Date Oct 2005 Posts 414 Senior Member	It's best to wait for the NTSB investigation. The Hudson corridor is uncontrolled, so certain procedures and visual rules are the responsibility of the pilot. The controller doesn't assign slots in the airspace to all the aircraft and keep them safely separated. But the aircraft are handed off into this space from class-B airspace, which is controlled. In the case of the airplane, it was Teterboro. The tour helicopters are already within the Hudson corridor. US airspace is divided into lettered classes. Class-A space is like a high altitude expressway. Class-B space is the most restrictive that goes to ground level. The tiered "upside down wedding cake" that sits over the airports is a good description. Philip Greenspun, a pilot who operates tours in Boston and has experience with the Hudson corridor, provides a good analysis. He focuses on the point of entry to the Hudson from Teterboro control (see the NYTimes graphic).
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