| A | B |
|---|
| FAA Regional Operations Center (ROC) | Network of Federal Aviation Administration (FAA) Command Control Communication Centers |
| Federal Aviation Administration (FAA) | National aviation authority of the United States, with powers to regulate all aspects of civil aviation |
| Flight Services Station (FSS) | Air traffic facility that provides information and services to aircraft pilots before, during, and after flights. Unlike Air Traffic Control (ATC), FSS is not responsible for giving instructions or clearances or providing separation, but they do relay ATC clearances |
| Flight Standards District Office (FSDO) | Locally affiliated field office of the Federal Aviation Administration (FAA) |
| Instrument Flight Rules (IFR) | When operation of an aircraft under Visual Flight Rules (VFR) is not safe or legal because the visual cues outside the aircraft are obscured by weather or darkness, instrument flight rules must be used instead |
| Mean Sea Level (MSL) | rue altitude, or the average height above standard sea level where the atmospheric pressure is measured in order to calibrate altitude |
| Model Aircraft | An Unmanned Aircraft (UA) that is capable of sustained flight in the atmosphere; flown within visual line-of-sight (VLOS) of the person operating the aircraft; and flown for hobby or recreational purposes. |
| MULTICOM | Frequency allocation used as a Common Traffic Advisory Frequency (CTAF) by aircraft near airports where no air traffic control is available. In the United States, the frequency is 122.9 MHz. At uncontrolled airports without a UNICOM, pilots are to self-announce on the MULTICOM frequency. |
| National Airspace System (NAS) | Reaches from the surface to 60,000 feet within the continental United States and its territories |
| Notice to Airmen (NOTAM) | Issued when there’s aeronautical information that could affect a pilot’s decision to make a flight. It includes such information as airport or aerodrome primary runway closures, taxiways, ramps, obstructions, communications, airspace, and changes in the status of navigational aids, to name a few. Time-critical and either of a temporary nature or not sufficiently known in advance to permit publication on aeronautical charts or in other operational publications. |
| Person Manipulating the Controls | A person other than the Remote Pilot in Command (PIC) who is controlling the flight of an Small Unmanned Aircraft System (sUAS) under the supervision of the remote PIC |
| Radio Frequencies (RF) | Any of the electromagnetic wave frequencies in the range from around 3 kHz to 300 GHz, which include those frequencies used for communications or radar signals |
| Remote Pilot Certificate | License that allows a person who passed the Aeronautical Knowledge Exam to serve as the Remote Pilot in Command (PIC) for a Small Unmanned Aircraft System |
| Remote Pilot in Command | A person who holds a Remote Pilot Certificate with a Small Unmanned Aircraft System (sUAS) rating and has the final authority and responsibility for the operation and safety of an sUAS operation conducted under Part 107 |
| Sectional Chart | Aeronautical chart showing topographical features that are important to aviators, such as terrain elevations, ground features identifiable from altitude and ground features useful to pilots. Also shows information on airspace classes, ground-based navigation aids, radio frequencies, longitude and latitude, navigation waypoints, and navigation routes |
| Small Unmanned Aircraft | A Unmanned Aircraft (UA) weighing less than 55 pounds, including everything that is onboard or otherwise attached to the aircraft, and can be flown without the possibility of direct human intervention from within or on the aircraft. |
| Small Unmanned Aircraft System | A small Unmanned Aircraft (UA) and its associated elements, including communication links and the components that control the small UA, that are required for the safe and efficient operation of the small UA in the National Airspace System (NAS). To reiterate, the difference between the Small Unmanned Aircraft and the Small Unmanned Aircraft System is simply that the system is the aircraft PLUS all the other equipment and components, such as the remote control / transmitter |
| Statute Miles | Legal or formal name for a mile, or 5280 feet |
| Significant Meteorological Information (SIGMET) | Weather advisory that contains information about significant weather events like thunderstorms and severe turbulence. |
| Temporary Flight Restrictions (TFR) | Restriction on an area of airspace due to the movement of government VIPs, special events, natural disasters, or other unusual events |
