-- --- .-. ... . / -.-. --- -.. . (In Morse code)

It means Morse code translated into Morse code. Passengers on airplanes are typically not exposed to ads while gazing out the window, but now they will be! With the utilization of the red lamps on the tops of skyscrapers and high-rise buildings as an advertising platform, dating back to 1949, cityscapes will never be the same.