During the "Big Hate", carrier operations involved very little, if any, radio communications. This was due to two things; the radios were very unreliable and couldn't be depended on for voice communications early on in the development of carrier aviation so the primary means of communication was either signal flags or Morse code via aldis lamp or radio. Secondly, once in the war, communications security was very important to them.
A lot of the procedures that we perform around the boat now in the Hornet or Tomcat were developed back in the late 30's through the late 40's and have served the carrier aviation community well to this day. We fly up alongside the island at 800 feet with the tail hook down, not because it looks cool, but because a long time ago, that was a signal to the carrier that you intended to land and if the carrier was prepared to accept you, they would raise the signal flag for C - Charlie. I have no idea why the Charlie pennant, maybe because it was easily identified from several hundred feet up, anyway, that became the signal that the carrier was ready to begin recoveries.
The one thing that I believe that ED could develop is a way to provide visual LSO cues that would be helpful during the landing just like the IFOLS of today. I have no clue as to the best way to go about this but that would be the one thing they could do that would be most useful :pilotfly: