Glossary
Plain-language definitions of the aviation and SkyYoke terms used in this wiki, from A/THR and Cost Index to TCAS, V1 and VAS.
Plain-language meanings of the terms used in SkyYoke and this wiki.
| Term | Meaning |
|---|---|
| A/THR | Auto-thrust. SkyYoke's system that moves the throttle to hold a target speed in managed mode. |
| AGL | Above ground level: height above the terrain directly below. |
| ALT | The autopilot's altitude target or altitude hold mode. |
| APPR | Approach mode: the autopilot flies the approach to a runway. |
| APU | Auxiliary power unit: a small engine that supplies power and air on the ground. |
| Auto-Trim | SkyYoke's fly-by-wire style automatic pitch trim for Airbus and Boeing aircraft. |
| Axis | A continuous control, such as roll, pitch, throttle or rudder, that must be bound in Infinite Flight. |
| Cost Index (CI) | A number that sets how fast managed speed flies: 0 saves fuel, higher is faster. |
| ECAM | Airbus engine and warning display. |
| EICAS | Boeing engine and crew alerting display. |
| Expo | A curve that makes a control softer near centre and stronger at the ends. |
| FCU | Airbus flight control unit, the autopilot panel. |
| FMA | Flight mode annunciator: the line at the top of the PFD showing the active autopilot modes. |
| GPWS | Ground proximity warning system: terrain and descent alerts. |
| HUD | Head-up display. In SkyYoke, the flight data strip at the top of the cockpit screen. |
| Infinite Flight Connect | Infinite Flight's built-in feature that lets external apps like SkyYoke connect. |
| LNAV | Lateral navigation: the autopilot follows the flight plan route. |
| Managed mode | The flight management system chooses the target from the flight plan (magenta). |
| ND | Navigation display: the map of route, waypoints and traffic. |
| Open mode | The aircraft flies straight to the value you dialed (cyan). |
| PFD | Primary flight display: attitude, speed, altitude and heading in one instrument. |
| Recenter | Makes the phone's current angle the neutral yoke position. |
| Red zone | The bottom of SkyYoke's throttle: reverse thrust at 40 kt or more on the ground, wheel brakes below. |
| RA / TA | TCAS resolution advisory (fly this vertical speed) and traffic advisory (traffic nearby). |
| TCAS | Traffic collision avoidance system. |
| TO/GA | Takeoff / go-around thrust, and SkyYoke's button that sets it. |
| V1 | Decision speed: after it, the takeoff continues. |
| V2 | Takeoff safety speed. |
| VAPP | Final approach speed. |
| VAS | Violation Avoidance System: SkyYoke's 250 kt-below-10,000 ft protection. |
| VNAV | Vertical navigation: the autopilot follows the flight plan's altitudes. |
| VR | Rotation speed: when to raise the nose for takeoff. |
| VREF | Landing reference speed. |
| V/S | Vertical speed, in feet per minute. |