If you make it any further in rank past this point, you should be shot. Even though he is a commander, he is the captain on a small ship. This is the God. You literally have to pay homage to him. He can do whatever he wants, no matter how stupid it is.
First classes are like a funnel for the chiefs.
How they treat you depends directly on the mood of the chief. You can identify a first class by the ship's mug they're carrying. But he won't be commanding a small ship, maybe a carrier or naval base. When one of them visits a small ship, it is similar to the admiral below. I've seen too many chiefs yell at other people for their own mistakes.