HOW HIGH CAN THEY FLY? KEVIN HAND While commercial unmanned aircraft systems operations are still only allowed on a case-by-case basis, hobbyists may operate model aircraft without FAA approval. That's no license for reckless behavior, however. According to FAA guidance, model aircraft operators should fly no higher than 400 feet agl and contact the airport or control tower when flying within five miles of an airport. It's the unmanned aircraft operator's responsibility to fly safely and stay away from manned aircraft, which usually-but not always- fly at higher altitudes. -SSD www.aopa.org/pilot AOPA PILOT | 61http://www.aopa.org/pilot