Each airspeed indicator must be marked as specified in paragraph (b) of this section, with the marks located at the corresponding indicated airspeeds.
The following markings must be made:
A red radial line—
For rotocraft other than helicopters, at VNE; and
For helicopters at VNE (power-on).
A red cross-hatched radial line at VNE (power-off) for helicopters, if VNE (power-off) is less than VNE (power-on).
For the caution range, a yellow arc.
For the safe operating range, a green arc.