[familyop]

"He must only want to be called 'Sir.'"

In Army D&C when I was in, they were addressed as "Mr." or "Mrs." and their names in person, IIRC, and mentioned by their ranks and names to others. ...the only uniformed personnel addressed that way. Oddly, most soldiers forgot that after initial training, but it's one of the few things I remember from the basic manuals.

[CWOJackson]

Mister is the proper form of casual address in the sea services. Chief Warrant Officer is the formal form of address. I usually settled for Your Royal Highness (I'm telling you, CWO is the best rank in the world, particularly in the USCG).

The main difference between the Coast Guard and Army is I believe the Army still only refers to CWO4 (and now the CWO5 they adopted) as "Chief" Warrant Officer.

The difference between the Coast Guard and all the rest of the services is that our CWOs are actually commissioned and not warranted and we only have CWO2, CWO3 and CWO4.