The CSS Indian Chief became a receiving ship in 1862. I found no mention of what it was before that. A Confederate naval veteran after the war claimed he was assigned picket boat duty in Charleston in 1863 and wrote that headquarters was in the "full rig ship Indian Chief." So, the Indian Chief also served as headquarters for the harbor picket ships.
A "full rig ship" is one with three masts and square-rigged ship.
On October 22, 1862, Lt. W.G. Dozier was relieved of command of the Confederate steamer Huntress and given command of the Indian Chief, replacing Lt. Ingraham.
Lt. Dozier was native South Carolinian and had been in the US Navy before the war and served as lieutenant and acting master of the frigate USS Richmond
As war approached, he resigned his commission and offered his services to his native state and was appointed to coast and harbor police before his transfer to the Confederate Navy.