[familyop]

"They're called Chief Warrant Officer in the Navy and in the Coast Guard."

Yes, but doesn't the Navy have chief petty officers or something like that? ...seems one of my grandfathers was a "chief" in the Navy, and he wasn't a warrant officer.

[CWOJackson]

And E-7 is a Chief Petty Officer, E-8 Senior Chief Petty Officer, E-9 Master Chief Petty Officer and of course the E-10 Master Chief Petty Officer of the fill in the blank.

[philman_36]

Yes, but doesn't the Navy have chief petty officers or something like that?
Yes, they do. They're strictly enlisted men. A CWO usually goes from the enlisted ranks to the officer rank. Lots of helo pilots were CWOs in the Navy.