What are these award markings on the USS Nimitz' island?

Factual Questions
1

…In this photo, here, on the railing above the level with the ship’s name and “ribbon rack.”

I think I recognize some Battle Efficiency "E"s, but I don’t know what the other letters or symbols represent.

Can anyone fill me in?

2

Answer here.

3

I like the dental award listed there. I can just see the “drilling” involved in that!