This isnt directed at anyone but a person with little or no marine experience should not assume that reliable colour vision is not a safety concern in marine navigation - there are a few professions where reliable colour recognition is very important e.g. paint matcher, vehicle sprayer
In the marine environment good colour vision might well be very important - there may be no other available cues or redundancy in the coding. Its a whole different area. I have no idea about the marine environment.
Sure - aviation adopted the port, starboard and rear nav lights from the marine environment but the colour part does not serve any useful purpose on an aircraft.
OOW