This dataset shows shows the airports in San Mateo County where Unmanned Aircraft Systems (UAS) operators must not interfere with manned aircraft operations and notify the airport operator or control tower before operating a UAS. The Federal Aviation Administration (FAA) has issued regulations for flying Unmanned Aircraft Systems (UAS) or, more commonly, drones. The following are the most important regulations related to UAS operations: 1. Fly no higher than 400 feet and remain below any surrounding obstacles when possible. 2. Do not intentionally fly over unprotected persons or moving vehicles, and remain at least 25 feet away from individuals and vulnerable property. 3. Check and follow all local laws and ordinances before flying over private property. 4. Remain well clear of and do not interfere with manned aircraft operations, and you must see and avoid other aircraft and obstacles at all times. 5. Contact the airport or control tower before flying within five miles of an airport. The full set of regulations can be found on the Know Before You Fly Site: http://knowbeforeyoufly.org/wp-content/uploads/2015/01/KBYF_Brochure.pdf