Alright, he got back to me. He doesn't know any specific details about this, no more than me or you.
Also, I noticed you used the term "shipmate" in your original post. I don't know what years you served, but I'm sure it was close enough to mine, and thus the same "rules" applied to you, in that this specific term was initially used to confer respect but turned into a term that meant a butt-chewing by a chief was coming your way, and so eventually this term was frowned upon to be used.
I wanted to use this term, as a troll to the kool-aid drinkers, and make them think I was super gung-ho about the world's finest navy (ugh), but those who knew me would know I was being facetious. Still, I had to say something super positive but not really, but what could I say that would not get me in possible trouble? Oh I know, I'll say "mateship". That's what I used. For example, "Mateship, what is the status of the REM-B? Has it been sterilized, because OMFS requires it today and podiatry had used it yesterday" or, when someone was in uniform and you didn't care to look at their rank or nametag and you just didn't plain care, "Mateship, how can I assist you?" Or when I was feeling especially troll-like, "Mateship! That was fine work you did today!"
Particularly that last one, my enlisted for the most part got along with me well and for the most part liked me a lot, but dang, did they HATE when I used "mateship" in everyday verbal communication.