> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/systems-guide/main-panel/primary-flight-display-pfd/speeds.md).
# SPEEDS
### SELECTED AIRSPEED READOUT
Displays speed/mach values.
**MAGENTA:** Automatically set by the FMS
**CYAN:** Manually entered by the flight crew.
### V2 SPEED (2)
Takeoff safety speed
### VR SPEED (R)
Takeoff rotation speed
### V1 SPEED (1)
Takeoff decision speed
**AIRSPEED TRANSITION:** Airspeed transitions automatically between IAS and Mach and vice versa at approximately 29.000 ft.
### VSPEED Bugs
Preview mode displays in the lower portion of the airspeed tape. VSPEEDS are entered in the MCDU. When no valid VSPEED data is available and the aircraft is on the ground cyan dashes are displayed.
### AIRSPEED ROLLING DIGITS
**GREEN:** Normal range.
**AMBER** Airspeed trend vector is reaching the VMO/MMO or it is at amber low speed awareness tape or the actual airspeed is at amber low speed awareness tape.
**RED INVERSE VIDEO:** Airspeed trend vector or actual airspeed is at red low speed awareness tape or at VMO/MMO barber pole.
### LOW SPEED AWARENESS (LSA) TAPE
Indicates the margin to the stick shaker speed. It rises from the bottom of the speed tape and has two colored ranges.
### SELECTED MACH READOUT
Displays speed/mach values.
**MAGENTA:** Automatically set by the FMS.
**CYAN:** Manually entered by the flight crew.
### SELECTED AIRSPEED BUG
**MAGENTA:** Displayed at the FMS airspeed target when an FMS mode is valid.
**CYAN:** Displayed at the Manual mode airspeed target.
### MACH AIRSPEED DIGITAL DISPLAY
Mach digital display of the current airspeed is displayed followed by an “M” label.
### VMO/MMO BARBER POLE
Displayed when the VMO/MMO is within the viewable range and covers speeds at or above VMO/MMO.
### VAC SPEED (AC)
Approach climb speed
### VF SPEED (F)
Flap retraction speed
### VAP SPEED (AP)
Approach speed
### VRF SPEED (RF)
Reference speed
### GREEN DOT
Provides a margin of 1.3g over stick shaker speed. Does account for ice, however it is invalid above FL200 with the ice EICAS message displayed.
### VFS SPEED (FS)
Takeoff final segment speed.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.flightsim-studio.com/e-jet-series/systems-guide/main-panel/primary-flight-display-pfd/speeds.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.