Final answer:
The NCO Support Channel and the duties and responsibilities of an NCO are detailed in military publications like the Army Doctrine Reference Publication 6-22 or Field Manual 7-22.7, which are specific to each military branch.
Step-by-step explanation:
The manual or publication that covers the NCO Support Channel and the duties and responsibilities of an NCO (Non-Commissioned Officer) is typically found in the regulations and field manuals associated with specific military branches.
In the United States Army, this information is often detailed in the Army Doctrine Reference Publication (ADRP) 6-22, "Army Leadership," or Field Manual (FM) 7-22.7, "The Army Noncommissioned Officer Guide." These manuals provide comprehensive information on the roles, responsibilities, and expectations of NCOs within the Army's leadership framework.
They address the NCO Support Channel, which is a channel of communication and supervision from the command sergeant major to first sergeant and then to other NCOs and enlisted personnel.