YOUR LEVEL OF MOBILITY
So that your airline can make the appropriate arrangements before you arrive at the airport, you should state when booking your flight to what extent your mobility is limited.
The following international classifications will help you to determine your level of disability yourself:
WCHC (Wheelchair Cabin Seat):
This passenger always needs a wheelchair. He cannot move about in the cabin without external assistance.
WCHS (Wheelchair Steps):
This passenger cannot climb steps but can walk a short distance.
WCHR (Wheelchair Ramp):
This passenger does not generally need a wheelchair or needs one only for moving longer distances. He can climb steps independently.
Passengers with impaired sight or blind, with or without guide-dog
Passengers with impaired hearing, deaf or deaf-mute
Passengers with some kind of intellectual or development disability
Passengers with impaired sight or blind and with impaired hearing