AAM Glossary
The definitive guide to the terminology, acronyms, and technical concepts of the Advanced Air Mobility industry.
Core Concepts
Advanced Air Mobility (AAM)
Core ConceptsAn emerging transportation system that moves people and goods by air between locations not traditionally served (or underserved) by existing aviation or surface transport. It uses innovative, often highly automated aircraft (typically electric or hybrid-electric) for urban, suburban, regional, and rural operations. AAM aims for safe, sustainable, affordable, and accessible aviation, including passenger transport, cargo delivery, and public services.
Air Taxi / Air Taxis
Core ConceptsOn-demand aerial transport service using AAM aircraft (often eVTOLs or powered-lift vehicles) to carry passengers, similar to ground taxis but in the air.
Low Altitude Mobility (LAM)
Core ConceptsOperations at very low altitudes (typically under 400 feet), often involving smaller unmanned aircraft in a UAS Traffic Management environment.
Regional Air Mobility (RAM)
Core ConceptsA subset of AAM emphasizing longer-range (typically 50–500 miles) intraregional trips, building on existing airport infrastructure for more efficient regional travel.
Urban Air Mobility (UAM)
Core ConceptsA subset of AAM focused specifically on operations in metropolitan and urban areas, often using on-demand air transport for passengers and cargo to reduce congestion.
Aircraft Types
CTOL (Conventional Take-Off and Landing)
Aircraft TypesTraditional fixed-wing aircraft requiring runways for takeoff and landing (sometimes included in broader AAM discussions for regional use).
eVTOL (electric Vertical Take-Off and Landing)
Aircraft TypesElectrically powered aircraft designed for vertical takeoff, landing, and efficient forward flight. Key to most AAM/UAM visions due to low noise, zero emissions (during operation), and suitability for urban environments.
Powered-Lift
Aircraft TypesFAA category for aircraft that combine characteristics of airplanes (wing-borne cruise) and rotorcraft (vertical lift). Most current eVTOL designs fall here.
STOL (Short Take-Off and Landing)
Aircraft TypesAircraft that can operate from very short runways, sometimes considered in AAM for regional or transitional operations.
VTOL (Vertical Take-Off and Landing)
Aircraft TypesCapability of an aircraft to take off and land vertically without a runway (like a helicopter), a core feature of many AAM vehicles.
Operations & Systems
Autonomous Flight / Fully Autonomous Aircraft
Operations and SystemsOperations where the aircraft performs all piloting functions independently, with no direct human involvement (a long-term AAM goal).
NAS (National Airspace System)
Operations and SystemsThe entire U.S. airspace, navigation, and air traffic control system into which AAM must safely integrate.
SVO (Single-Pilot Operations / Single Vehicle Operations)
Operations and SystemsConcept where one pilot (or remote operator) manages multiple functions with heavy automation support.
UTM (UAS Traffic Management / Unmanned Aircraft System Traffic Management)
Operations and SystemsA system for managing low-altitude unmanned aircraft operations, expected to evolve for broader AAM integration.
Infrastructure
Vertiport
InfrastructureDedicated facility (ground-based, rooftop, or elevated) for AAM/eVTOL takeoff, landing, charging, passenger handling, and parking.
Vertistop
InfrastructureSmaller, simpler landing/takeoff pad for AAM, often without full passenger facilities.
Other Key Terms
AAM Ecosystem
Other Key TermsThe interconnected network of aircraft, infrastructure, airspace management, regulations, workforce, energy systems, and stakeholders enabling AAM operations.
Innovate28
Other Key TermsFAA's near-term implementation plan (focused through 2028) for initial AAM integration and scaled operations.
