Command master chief petty officer (CMDCM)[N 1] is an enlisted rating in the United States Navy and U.S. Coast Guard, as well as the Japan Maritime Self-Defense Force.
In the U.S. Navy, the command master chief petty officer is the senior enlisted advisor at a command and as such works as a liaison between the commanding officer and the enlisted ranks, serving as the senior enlisted leader. In this capacity, the CMDCM assists the commanding officer in issues of quality of life, discipline, training, and morale. Collectively, the CMDCM, commanding officer, and executive officer are referred to as the "big three".
Japan's navy, the Japanese Maritime Self-Defense Force (JMSDF), first established their command master chief petty officer program in 2003, modelling it on that of the U.S. Navy's.
Like the U.S. Navy, the United States Coast Guard also utilizes the title and designation of command master chief. These individuals are also informally referred to as "gold badge" due to the insignia they wear. Command master chiefs can be so designated either by the Commandant of the Coast Guard or the Master Chief Petty Officer of the Coast Guard. One commandant-designated CMC is located at each area, each district, both maintenance and logistics commands, headquarters, the Coast Guard Academy, and the Deployable Operations Group. One commandant-designated reserve command master chief is located at each area, each district, both maintenance and logistics commands. One Master Chief Petty Officer of the Coast Guard-designated CMC is located at each training center, Coast Guard recruiting command, and the Personnel Service Center.
The rate insignia of a command master chief petty officer consists of two silver stars, one perched eagle, one silver shield taking the place of rating insignia, and one rocker above three chevrons.
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