Command Master Chief Petty Officer

United States Navy
A Command Master Chief Petty Officer (CMDCM) is the most senior enlisted sailor in a United States Navy unit. Being the primary liaison between commissioned officers and enlisted sailors, they are an important resource for the commanding officer as his or her senior enlisted advisor, and are often called upon to gauge morale and battle readiness. In smaller units, this position may be filled by a Command Senior Chief Petty Officer (CMDCS), a Command Chief Petty Officer (CMDC), or a regular Master Chief Petty Officer who is not yet a Command Master Chief. The rates Force Master Chief Petty Officer (FORCM) and Fleet Master Chief Petty Officer (FLTCM) are used for larger units such as U.S. Fleet Forces Command FORCM, Navy Expeditionary Combat Command FORCM, U.S. Pacific Fleet FLTCM, and Submarine Force U.S. Atlantic Fleet FLTCM.

Submarines
U.S. Navy submarines do not have a Command Master Chief. Onboard a submarine, the equivalent of a Command Master Chief is known as the "Chief of the Boat," or "COB." The Chief of the Boat of a submarine has similar duties to that of a Command Master Chief in a surface, aviation, or shore unit.

Insignia
The rate insignia of a Command Master Chief Petty Officer consists of two silver stars, one perched eagle, one silver star taking the place of rating insignia, and one rocker above three chevrons.

United States Coast Guard
Like the U.S. Navy, the United States Coast Guard also utilizes the title and designation of Command Master Chief (CMC). 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 (RCMC) is located at each Area, each District, and both Maintenance and Logistics Commands. One MCPOCG designated CMC is located at each Training Center, Coast Guard Recruiting Command, and the Personnel Service Center.

Insignia
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.