Gary Emerson wrote:

As I think about it, it might be best if there was a single array of
high output LEDs. When both "colors" of the array are "on" then you
have a single visible color that means "ok" (red and blue make green in
concept, but in emitted light that combination doesn't work). That way
the glider pilot can verify at the start that both signals "work" and
they stay "on" for the duration of the tow. If either the "warning" or
"get off" switches are selected in the cockpit then only the
corresponding "color" is then visible to the glider pilot. Perhaps with
the "warning" being a steady signal and "get off" being a rapid flash to
help with fast recognition and a sense of urgency.


Are glider pilots required to demonstrate accurate color vision?


Jack