That rank has never existed in the Coast Guard. The highest rank in the Coast Guard is a four-star admiral referred to as "Commandant", just like the Marine Corps. The position and rank is currently filled by Admiral Robert J. Papp, Jr.
His first rank was a Coast Guard.
CDR is a Commander in the US Coast Guard.
It depends on your rank.
The Commandant of the Guard is an Oberst or Colonel.
There is no kind of about it. Both the US Navy and Coast Guard use the Rank Master Chief Petty Officer for the highest enlisted rank. Only Warrant and Commissioned officers rank above Master Chiefs.
No, the equal rank in the Navy or Coast Guard is a Captain.
The highest rank in the Coast Guard is the Commandant, who holds the rank of Admiral (abbreviated ADM) and is in pay grade O-10. Admiral rank insignia is four stars. Other admiral ranks include Rear Admiral Lower Half (RDML/three stars/O-9), Rear Admiral Upper Half (RADM/two stars/O-8), and Vice Admiral (VADM/one star/O-7).
That would depend on his paygrade and time in service. Rank has nothing to do with reserve status.
Just like the active component, 4 star general is the highest.
The Coast Guard uses the same rank structure as the Navy. Thus, anyone who wears the rank of Ensign, Lieutenant JG, Lieutenant, Lieutenant Commander, Commander, Captain, or any Admiral rank, in considered a commissioned officer of the Coast Guard, and is also recognised by the rest of the Armed Forces as a commissioned officer, as well.