Pilots flying in the VFR Hudson River corridor (below 1100 feet) monitor and announce their position over 123.05. I am a private pilot living in NYC and have flown that route a number of times. It is a tense experience. Air Traffic Control will, on request, often allow a plane to fly the same route but at 1,500 feet. This altitude is in controlled airspace and one must fly the assigned heading and altitude exactly but it places you above the choppers and provides a margin of security. It's still a hectic 10-15 minutes in that it involves three frequency changes ("hand-offs") from NY Approach to LaGuardia Tower to Newark Tower then back to NY Approach (southbound).
Doug