The United States Coast Guard (USCG) is a unique branch of the military that operates under the Department of Homeland Security during peacetime and under the Department of the Navy during wartime. The USCG has a wide range of responsibilities, including maritime law enforcement, search and rescue, marine safety, and environmental protection. To carry out these duties, the Coast Guard relies on a diverse group of personnel with various specialties, known as Military Occupational Specialties (MOS). Here, we will delve into the US Coast Guard MOS list, exploring the different categories and specialties that make up the Coast Guard's workforce.
Understanding the US Coast Guard MOS System

The US Coast Guard uses a system of ratings and ratings specialties to categorize its personnel into different occupations. These ratings are similar to the Military Occupational Specialties (MOS) used by other branches of the military. The Coast Guard has over 20 different ratings, each with its own set of responsibilities and requirements. Some ratings are highly specialized, requiring advanced training and expertise, while others are more general and may involve a broader range of tasks.
Coast Guard Ratings Categories
The US Coast Guard ratings can be broadly categorized into several groups, including:
- Deck and Ordnance: Ratings in this category are responsible for the operation and maintenance of the ship’s deck and ordnance systems, including boatswain’s mates, gunner’s mates, and machinist’s mates.
- Administration and Support: This category includes ratings such as yeoman, personnel specialist, and culinary specialist, who provide administrative and support services to the Coast Guard.
- Aviation: Aviation ratings include pilots, aircrew members, and aviation maintenance technicians, who operate and maintain the Coast Guard’s aircraft.
- Engineering and Hull: Ratings in this category are responsible for the operation and maintenance of the ship’s engines, hull, and other systems, including machinery technicians, electrician’s mates, and damage controlmen.
- Port and Waterway Security: This category includes ratings such as port security specialist and marine inspector, who are responsible for ensuring the security of ports and waterways.
- Response and Prevention: Ratings in this category include rescue and survival specialists, who are trained to respond to emergencies and prevent accidents.
US Coast Guard MOS List

Here is a list of some of the most common US Coast Guard ratings, organized by category:
Rating | Job Description |
---|---|
Boatswain’s Mate (BM) | Responsible for the operation and maintenance of the ship’s deck and boats. |
Gunner’s Mate (GM) | Responsible for the operation and maintenance of the ship’s ordnance systems. |
Machinist’s Mate (MM) | Responsible for the operation and maintenance of the ship’s engines and other mechanical systems. |
Yeoman (YN) | Provides administrative support to the Coast Guard, including personnel management and communications. |
Pilot (AV) | Operates Coast Guard aircraft, including helicopters and fixed-wing planes. |
Aviation Maintenance Technician (AMT) | Responsible for the maintenance and repair of Coast Guard aircraft. |
Culinary Specialist (CS) | Responsible for preparing and serving food to Coast Guard personnel. |
Port Security Specialist (PS) | Responsible for ensuring the security of ports and waterways. |
Rescue and Survival Specialist (RS) | Trained to respond to emergencies and prevent accidents. |

Key Points
- The US Coast Guard has a unique system of ratings and ratings specialties that categorize personnel into different occupations.
- There are over 20 different ratings in the Coast Guard, each with its own set of responsibilities and requirements.
- Ratings can be broadly categorized into groups such as Deck and Ordnance, Administration and Support, Aviation, Engineering and Hull, Port and Waterway Security, and Response and Prevention.
- Each rating has a specific job description and set of duties, and personnel must meet certain requirements and complete training to qualify for a particular rating.
- The US Coast Guard MOS list is designed to meet the unique needs of the service, with a focus on maritime law enforcement, search and rescue, and environmental protection.
Conclusion
In conclusion, the US Coast Guard MOS list is a critical component of the service’s ability to carry out its diverse range of responsibilities. From Deck and Ordnance to Response and Prevention, each rating plays a vital role in ensuring the Coast Guard can protect the nation’s maritime interests and respond to emergencies. Whether you’re interested in a career in aviation, engineering, or administration, the Coast Guard has a rating that can match your skills and interests.
What is the difference between a rating and a Military Occupational Specialty (MOS)?
+A rating and a MOS are similar, but the Coast Guard uses the term “rating” to refer to its occupational specialties, while other branches of the military use the term “MOS”.
How do I qualify for a particular rating in the Coast Guard?
+To qualify for a particular rating, you must meet the requirements for that rating, which may include completing training, passing a test, or gaining experience in a related field.
Can I change my rating in the Coast Guard?
+Yes, it is possible to change your rating in the Coast Guard, but this typically requires completing additional training and meeting the requirements for the new rating.