Folks,
I want to make clear just one point.
The need for a particular standard of colour perception in aviation (by NAAs) is assumed and asserted, it is not demonstrated, let alone proven.
In the mid-1990s, Dr. Pape represented IAOPA, the International Aircraft Owners and Pilots Association, the peak body of all the national AOPAs, at an ICAO medical conference in Warsaw, because a major part of the agenda was colour perception (there is no such thing as "colour blind") and Dr. Pape is not just Australia's leading expert, but internationally recognised.
In those days, "glass" cockpits were cathode ray tubes (CRT) and a fairly common fault was the loss of the colour generator, so that the screen reverted to gray scales.
In anticipation of all the standard arguments about the "critical need" to see "true colours", Dr. Pape (courtesy of Qantas Airways Ltd) had true copies of the FAA/CASA certified MELs for the B767, which showed that loss of colour, with any of the screens operating in gray scale mode, produced exactly zero operating limitations.
Put another way, loss of the colour, and the need to read the numbers and interpret the scales without colour had precisely zero "safety" connotations.
Put more correctly, the loss of colour on the screen(s) did not increase risk of pilot error due misinterpretation of the information presented in normal or non-normal operation.
So much for the need for every pilot to see exactly the same colours.
Tootle pip!!
Last edited by LeadSled; 8th Jun 2014 at 07:45.
Reason: minor correction