B737-800
Flight Crew Air Transport Pilot (ATP)
Conflict NMAC
Air Traffic Control Issued Advisory / Alert
Human Factors
During the hand-off to final approach controller we were advised the previous aircraft had sighted a UAV in the vicinity of DIALS while on the Visual Approach to RWY 31. We were told the UAV was below and to the right side of the flight path. The First Officer began to look outside for the UAV. Approximately 1.5 miles prior to DIALS he saw a UAV. UAV was:100-200 FT off the right wing50-100 FT above the aircraft (aircraft was at 2;500 FT)Shape: RectangularSize: Approximately 2 FT longColor: Silver/WhiteConfiguration: 2 propeller areas - front and backWe advised the Final Approach Controller and the LGA Tower of all the details.
B737 Captain reports a NMAC with a UAV at 2;500 feet near DIALS during the Expressway Visual Approach to LGA.