These would be senior enlisted (E-7 and above) or any commissioned officer.
A Casualty Assistance Officer must be of equal or higher rank than the casualty. This is also true of the Casualty Notification Officer.
A CAO must hold a rank of Sergeant First Class or above. CAO stands for Casualty Assistance Officer. Normally, the CAO is a member of the casualty's unit.
No, there is no such rank in the US Navy. There is a Vice Admiral ranking. And the assistant to the commanding officer of a vessel is called the Executive Officer.
In order to serve as a casualty assistance officer in the United States Army you must be at a certain rank. These are anything at or above sergeant first class.
Assistant commandant is not a rank, it is a position.
Casualty Assistance Officers and Casualty Notification Officers are required to be equal or higher rank than that of the deceased.
No, first officer is not a higher rank than colonel on the Titanic. First Officer was a rank within the crew of a ship, while Colonel is a military rank.
Warrant officer
We do not know what you mean by "cao".
No, a second lieutenant is the lowest rank for a new officer in the army.
Lieutenant is a higher rank then Sergeant. The Lieutenant is a Commissioned Officer and the Sergeant is the Non-Commissioned Officer.
An RBI officer of the rank General Manager and above is a gazetted officer.