Northern California TRACON (NCT, radio communications: NorCal, NorCal Approach and NorCal Departure) is a terminal radar approach control (TRACON) facility in Mather, California, that serves the Southern California region.
It is a unit of the Air Traffic Organization (ATO) of the Federal Aviation Administration (FAA) is an air traffic control facility that provides safety alerts, separation, and sequencing of air traffic arriving, departing, and transiting the airspace and airports in Northern California.
When an arriving aircraft nears the Bay Area, Oakland Center advises it to contact NorCal TRACON.
TRACON gives the arrival a descent profile and other landing aid clearances.
After TRACON sets up the flight for an approach to landing, the flight contacts the air traffic control tower at the arrival airport for landing clearance.