Final answer:
A Command Master Chief (CMC) is an advisory role to the Commanding Officer on various aspects of the welfare of enlisted personnel in a military command.
Step-by-step explanation:
A CMC, or Command Master Chief, is the special assistant to the Commanding Officer in all matters pertaining to the health, welfare, job satisfaction, morale, utilization, and advancement and training of the command's enlisted personnel. In the context of the military, the CMC plays a pivotal role in managing the enlisted ranks and acts as a bridge between the enlisted personnel and the officers. The CMC's influence and responsibilities are geared towards improving the effectiveness and quality of life for sailors within the command.