IN RELATION TO COLOUR-BLINDNESS. 147 sented as paddle steamers. The steersman of B in both cases should see all the lights of A, and be warned of a steamer’s direct approach, whether he distinguished the colour of the side-lights or not. … But the steersman of A has only the colour of one of B’s side-lights, to tell him, whether, as in Fig. 2, B is crossing to starboard (his right hand); or as in Fig. 3, to port (his left hand) ; and if he be the only look-out, and és colour-blind, he will be uncertain whether to port or starboard…
Color Perception · Color Vision Defects · Accident Prevention · Accidents, Traffic
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