I have only been able to find this bit of information:

The Orange Co. Coast Guard, organized under Spec. Ord. #27, John Merriman, Capt.,
Muster Roll filed June 12, 1863

John Merriman, Captain, Orange County Coast Guards. (John Merriman, Captain.), Texas Local Defense Troops
Muster Roll June 9, 1862, Orange, Orange Co., Tex.

http://www.texansinthecivilwar.com/Southern_Heroes/coast_guard.html