The new FAA rules regarding air traffic over the Hudson River go into effect Thursday, separating pilots into three altitude corridors: in the lower two (below 1,300 feet), local commuter planes and sightseeing helicopters would still rely on the "see and avoid" method, but would also be required to tune their radio to a frequency of 123.05; announce their location, description and route; and obey a speed limit of 140 knots or less. Longer flights under the jurisdiction of air traffic controllers will fly above 1,300 feet. But critics say the rules don't go far enough to prevent another crash like the August 8th collision between a small plane and a sightseeing helicopter that claimed nine lives.



