Starfleet Enlisted Ratings

Ratings are general occupations that consist of specific skills and abilities. These ratings are held by enlisted personnel holding the grade of Petty Officer Third Class and above, and are obtained after a Crewman attends A School and passes the Starfleet Petty Officer's Exam. Each rating has its own specialty badge, which is worn on the sleeves of the uniform below the individual's rank insignia.
Ratings should not be confused with "rates," which describe Starfleet's enlisted pay-grades.
Enlisted personnel are referred to by their rating and rate. For example, if someone's rate is Petty Officer Second Class and his rating is Boatswain's Mate, then combining the two — Boatswain's Mate Second Class (BM2) — defines both rate and rating in formal address or epistolary salutation. The rates of Crewman and Crewman Apprentice lack ratings, and are thus personnel of these grades are addressed simply as "Crewman", while personnel holding the grade of Crewman Recruit are addressed as "recruit".
==Command==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Chief of the Boat OR Command Master Chief 	COB 	 	
 	The Chief of the Boat is the senior-most enlisted person on any Starfleet vessel, while the Command Master Chief holds the same position on any installation. Typically a Master Chief Petty Officer, this person is responsible for all enlisted personnel assigned to their post, and is a liaison between the ratings and the officers. 	The Chief of the Boat is the senior-most enlisted person on any Starfleet vessel, while the Command Master Chief holds the same position on any installation. Typically a Master Chief Petty Officer, this person is responsible for all enlisted personnel assigned to their post, and is a liaison between the ratings and the officers. 	The Chief of the Boat is the senior-most enlisted person on any Starfleet vessel, while the Command Master Chief holds the same position on any installation. Typically a Master Chief Petty Officer, this person is responsible for all enlisted personnel assigned to their post, and is a liaison between the ratings and the officers. 	The Chief of the Boat is the senior-most enlisted person on any Starfleet vessel, while the Command Master Chief holds the same position on any installation. Typically a Master Chief Petty Officer, this person is responsible for all enlisted personnel assigned to their post, and is a liaison between the ratings and the officers.
 	 	 	 	
 	Personnel Clerk 	PN 	 	
 	Personnel Clerks are responsible for assisting Personnel officers with administrative duties and provide enlisted personnel with information about Starfleet jobs, opportunities for general education and training, and promotion requirements. They assist enlisted members' families with reassignments in hardship situations. Personnel Clerks keep records up to date, prepare reports, type letters and maintain files.	Personnel Clerks are responsible for assisting Personnel officers with administrative duties and provide enlisted personnel with information about Starfleet jobs, opportunities for general education and training, and promotion requirements. They assist enlisted members' families with reassignments in hardship situations. Personnel Clerks keep records up to date, prepare reports, type letters and maintain files.	Personnel Clerks are responsible for assisting Personnel officers with administrative duties and provide enlisted personnel with information about Starfleet jobs, opportunities for general education and training, and promotion requirements. They assist enlisted members' families with reassignments in hardship situations. Personnel Clerks keep records up to date, prepare reports, type letters and maintain files.	Personnel Clerks are responsible for assisting Personnel officers with administrative duties and provide enlisted personnel with information about Starfleet jobs, opportunities for general education and training, and promotion requirements. They assist enlisted members' families with reassignments in hardship situations. Personnel Clerks keep records up to date, prepare reports, type letters and maintain files.
 	 	 	 	
 	Mass Communications Specialist 	MC 	 	
 	Mass Communications Specialists are public affairs and visual information experts. They present the Starfleet story through a variety of media. Mass Communications Specialists write and produce print and broadcast journalism, news, and feature stories for military and civilian news sources. They record still and video photography of Starfleet operations, exercises, and other events. 	Mass Communications Specialists are public affairs and visual information experts. They present the Starfleet story through a variety of media. Mass Communications Specialists write and produce print and broadcast journalism, news, and feature stories for military and civilian news sources. They record still and video photography of Starfleet operations, exercises, and other events. 	Mass Communications Specialists are public affairs and visual information experts. They present the Starfleet story through a variety of media. Mass Communications Specialists write and produce print and broadcast journalism, news, and feature stories for military and civilian news sources. They record still and video photography of Starfleet operations, exercises, and other events. 	Mass Communications Specialists are public affairs and visual information experts. They present the Starfleet story through a variety of media. Mass Communications Specialists write and produce print and broadcast journalism, news, and feature stories for military and civilian news sources. They record still and video photography of Starfleet operations, exercises, and other events.
 	 	 	 	
 	Legal Clerk 	LN 	 	
 	Legal Clerks are trained legal aides who assist professionals in the field of law. They work in the Starfleet Judge Advocate General's Corps, performing administrative and clerical tasks necessary to process claims and conduct court and administrative hearings. They maintain records, documents and legal reference libraries. They perform many duties related to courts-martial and nonjudicial hearings. 	Legal Clerks are trained legal aides who assist professionals in the field of law. They work in the Starfleet Judge Advocate General's Corps, performing administrative and clerical tasks necessary to process claims and conduct court and administrative hearings. They maintain records, documents and legal reference libraries. They perform many duties related to courts-martial and nonjudicial hearings. 	Legal Clerks are trained legal aides who assist professionals in the field of law. They work in the Starfleet Judge Advocate General's Corps, performing administrative and clerical tasks necessary to process claims and conduct court and administrative hearings. They maintain records, documents and legal reference libraries. They perform many duties related to courts-martial and nonjudicial hearings. 	Legal Clerks are trained legal aides who assist professionals in the field of law. They work in the Starfleet Judge Advocate General's Corps, performing administrative and clerical tasks necessary to process claims and conduct court and administrative hearings. They maintain records, documents and legal reference libraries. They perform many duties related to courts-martial and nonjudicial hearings.
 	 	 	 	
 	Pay Clerk 	PC 	 	
 	Pay Clerks assist Starfleet Paymasters and Accountants in administrative and technical duties and are responsible for mediating pay disputes. 	Pay Clerks assist Starfleet Paymasters and Accountants in administrative and technical duties and are responsible for mediating pay disputes. 	Pay Clerks assist Starfleet Paymasters and Accountants in administrative and technical duties and are responsible for mediating pay disputes. 	Pay Clerks assist Starfleet Paymasters and Accountants in administrative and technical duties and are responsible for mediating pay disputes.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Command) 	YNC
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Flight Control==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Navigator's Mate 	NV 	 	
 	Navigator's Mates assist Navigation Officers with course plots, cartographical analysis, and analysis of stellar phenomena and other navigational hazards. 	Navigator's Mates assist Navigation Officers with course plots, cartographical analysis, and analysis of stellar phenomena and other navigational hazards. 	Navigator's Mates assist Navigation Officers with course plots, cartographical analysis, and analysis of stellar phenomena and other navigational hazards. 	Navigator's Mates assist Navigation Officers with course plots, cartographical analysis, and analysis of stellar phenomena and other navigational hazards.
 	 	 	 	
 	Deckman 	DN 	 	
 	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in both shuttlebays and hangerbays.	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in both shuttlebays and hangerbays.	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in both shuttlebays and hangerbays.	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in both shuttlebays and hangerbays.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Flight Control) 	YNF
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Tactical==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Gunner's Mate 	GM 	(Gunner's Mate, Phaser)(Gunner's Mate, Point-Defense) 	GMPGMD
 	Gunner's Mates operate and maintain all ship-mounted phaser and disruptor equipment, as well as the Close-in Weapons System (CIWS) and all associated equipment. They repair electrical, electronic, hydraulic and mechanical systems.	Gunner's Mates operate and maintain all ship-mounted phaser and disruptor equipment, as well as the Close-in Weapons System (CIWS) and all associated equipment. They repair electrical, electronic, hydraulic and mechanical systems.	Gunner's Mates operate and maintain all ship-mounted phaser and disruptor equipment, as well as the Close-in Weapons System (CIWS) and all associated equipment. They repair electrical, electronic, hydraulic and mechanical systems.	Gunner's Mates operate and maintain all ship-mounted phaser and disruptor equipment, as well as the Close-in Weapons System (CIWS) and all associated equipment. They repair electrical, electronic, hydraulic and mechanical systems.
 	 	 	 	
 	Torpedoman's Mate 	TM 	 	
 	Torpedoman's Mates operate and maintain torpedoes and torpedo fire-control systems and are responsible for shipping and storage of torpedoes. 	Torpedoman's Mates operate and maintain torpedoes and torpedo fire-control systems and are responsible for shipping and storage of torpedoes. 	Torpedoman's Mates operate and maintain torpedoes and torpedo fire-control systems and are responsible for shipping and storage of torpedoes. 	Torpedoman's Mates operate and maintain torpedoes and torpedo fire-control systems and are responsible for shipping and storage of torpedoes.
 	 	 	 	
 	Ordnance Disposal Technician 	EOD 	 	
 	Explosive Ordnance Disposal Technicians locate, identify, render safe and dispose of all forms of ordnance, both Federation and non-Federation. EOD technicians occasionally assist civilian law enforcement agencies. 	Explosive Ordnance Disposal Technicians locate, identify, render safe and dispose of all forms of ordnance, both Federation and non-Federation. EOD technicians occasionally assist civilian law enforcement agencies. 	Explosive Ordnance Disposal Technicians locate, identify, render safe and dispose of all forms of ordnance, both Federation and non-Federation. EOD technicians occasionally assist civilian law enforcement agencies. 	Explosive Ordnance Disposal Technicians locate, identify, render safe and dispose of all forms of ordnance, both Federation and non-Federation. EOD technicians occasionally assist civilian law enforcement agencies.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Tactical) 	YNT
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Security==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Master-at-Arms 	MA 	 	
 	Masters-at-Arms uphold law and order aboard ships, and Starfleet facilities. The basic duty of an MA is to enforce rules and regulations, maintain good order and discipline, and protect life and property. Some other duties include conducting criminal investigations, personal protective services, and taking part in correctional and rehabilitative programs.	Masters-at-Arms uphold law and order aboard ships, and Starfleet facilities. The basic duty of an MA is to enforce rules and regulations, maintain good order and discipline, and protect life and property. Some other duties include conducting criminal investigations, personal protective services, and taking part in correctional and rehabilitative programs.	Masters-at-Arms uphold law and order aboard ships, and Starfleet facilities. The basic duty of an MA is to enforce rules and regulations, maintain good order and discipline, and protect life and property. Some other duties include conducting criminal investigations, personal protective services, and taking part in correctional and rehabilitative programs.	Masters-at-Arms uphold law and order aboard ships, and Starfleet facilities. The basic duty of an MA is to enforce rules and regulations, maintain good order and discipline, and protect life and property. Some other duties include conducting criminal investigations, personal protective services, and taking part in correctional and rehabilitative programs.
 	 	 	 	
 	Instructor 	IN 	(Weapons Instructor) 	INW
 	Weapons Instructors perform duties related to small arms instruction and lethal and non-lethal weapons training for all personnel assigned to their post. 	Weapons Instructors perform duties related to small arms instruction and lethal and non-lethal weapons training for all personnel assigned to their post. 	Weapons Instructors perform duties related to small arms instruction and lethal and non-lethal weapons training for all personnel assigned to their post. 	Weapons Instructors perform duties related to small arms instruction and lethal and non-lethal weapons training for all personnel assigned to their post.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Security) 	YNS
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Operations==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Boatswain's Mate 	BM 	 	
 	Boatswain's Mates train and supervise personnel in all activities relating to deck operations, and frequently serve as Petty Officers-in-charge of small craft. Most Command Master Chiefs and Chiefs of the Boat were once Botswain's Mates, though there are exceptions to this rule. 	Boatswain's Mates train and supervise personnel in all activities relating to deck operations, and frequently serve as Petty Officers-in-charge of small craft. Most Command Master Chiefs and Chiefs of the Boat were once Botswain's Mates, though there are exceptions to this rule. 	Boatswain's Mates train and supervise personnel in all activities relating to deck operations, and frequently serve as Petty Officers-in-charge of small craft. Most Command Master Chiefs and Chiefs of the Boat were once Botswain's Mates, though there are exceptions to this rule. 	Boatswain's Mates train and supervise personnel in all activities relating to deck operations, and frequently serve as Petty Officers-in-charge of small craft. Most Command Master Chiefs and Chiefs of the Boat were once Botswain's Mates, though there are exceptions to this rule.
 	 	 	 	
 	Operations Specialist 	OS 	 	
 	Operations Specialists operate and maintain operations equipment, Identify Friend of Foe (IFF) transponder equipment, and internal and external sensory and communications gear. 	Operations Specialists operate and maintain operations equipment, Identify Friend of Foe (IFF) transponder equipment, and internal and external sensory and communications gear. 	Operations Specialists operate and maintain operations equipment, Identify Friend of Foe (IFF) transponder equipment, and internal and external sensory and communications gear. 	Operations Specialists operate and maintain operations equipment, Identify Friend of Foe (IFF) transponder equipment, and internal and external sensory and communications gear.
 	 	 	 	
 	Sensor Technician 	ST 	 	
 	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems. 	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems. 	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems. 	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems.
 	 	 	 	
 	Signalman 	SM 	 	
 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems.
 	 	 	 	
 	Computer Technician 	CT 	 	
 	Computer Technicians are responsible for operation, maintenance, and repair of all Starfleet computer systems. 	Computer Technicians are responsible for operation, maintenance, and repair of all Starfleet computer systems. 	Computer Technicians are responsible for operation, maintenance, and repair of all Starfleet computer systems. 	Computer Technicians are responsible for operation, maintenance, and repair of all Starfleet computer systems.
 	 	 	 	
 	Holosystems Technician 	HT 	 	
 	Holosystems technicians maintain the Holodeck systems of Starfleet starbases and ground installations. 	Holosystems technicians maintain the Holodeck systems of Starfleet starbases and ground installations. 	Holosystems technicians maintain the Holodeck systems of Starfleet starbases and ground installations. 	Holosystems technicians maintain the Holodeck systems of Starfleet starbases and ground installations.
 	 	 	 	
 	Quartermaster's Mate 	QM 	 	
 	Quartermaster's Mates are Starfleet's supply clerks. They see that needed supplies are available including everything from clothing and machine parts to forms and food. They have duties as warehousemen, purchasing agents, stock clerks and supervisors, inventory clerks, buyers, parts clerks, and bookkeepers, and they assist logistics officers and quartermasters. 	Quartermaster's Mates are Starfleet's supply clerks. They see that needed supplies are available including everything from clothing and machine parts to forms and food. They have duties as warehousemen, purchasing agents, stock clerks and supervisors, inventory clerks, buyers, parts clerks, and bookkeepers, and they assist logistics officers and quartermasters. 	Quartermaster's Mates are Starfleet's supply clerks. They see that needed supplies are available including everything from clothing and machine parts to forms and food. They have duties as warehousemen, purchasing agents, stock clerks and supervisors, inventory clerks, buyers, parts clerks, and bookkeepers, and they assist logistics officers and quartermasters. 	Quartermaster's Mates are Starfleet's supply clerks. They see that needed supplies are available including everything from clothing and machine parts to forms and food. They have duties as warehousemen, purchasing agents, stock clerks and supervisors, inventory clerks, buyers, parts clerks, and bookkeepers, and they assist logistics officers and quartermasters.
 	 	 	 	
 	Storekeeper 	SK 	 	
 	Storekeepers act as store managers and sales clerks. 	Storekeepers act as store managers and sales clerks. 	Storekeepers act as store managers and sales clerks. 	Storekeepers act as store managers and sales clerks.
 	 	 	 	
 	Culinary Specialist 	CS 	 	
 	Culinary Specialists prepare menus and order the quantities and types of food items. They operate kitchen and dining facilities, manage large facilities, keep records for food supplies and financial budgets, and can even serve as flight attendants on transport craft. They can also serve as personal food service specialists, household/estate managers or chefs for admirals, the Federation President, or for a commanding officer aboard ship or at shore bases. Ashore, Culinary Specialists often manage and maintain officers' clubs.	Culinary Specialists prepare menus and order the quantities and types of food items. They operate kitchen and dining facilities, manage large facilities, keep records for food supplies and financial budgets, and can even serve as flight attendants on transport craft. They can also serve as personal food service specialists, household/estate managers or chefs for admirals, the Federation President, or for a commanding officer aboard ship or at shore bases. Ashore, Culinary Specialists often manage and maintain officers' clubs.	Culinary Specialists prepare menus and order the quantities and types of food items. They operate kitchen and dining facilities, manage large facilities, keep records for food supplies and financial budgets, and can even serve as flight attendants on transport craft. They can also serve as personal food service specialists, household/estate managers or chefs for admirals, the Federation President, or for a commanding officer aboard ship or at shore bases. Ashore, Culinary Specialists often manage and maintain officers' clubs.	Culinary Specialists prepare menus and order the quantities and types of food items. They operate kitchen and dining facilities, manage large facilities, keep records for food supplies and financial budgets, and can even serve as flight attendants on transport craft. They can also serve as personal food service specialists, household/estate managers or chefs for admirals, the Federation President, or for a commanding officer aboard ship or at shore bases. Ashore, Culinary Specialists often manage and maintain officers' clubs.
 	 	 	 	
 	Ship's Serviceman 	SH 	 	
 	Ship's Servicemen manage barber shops, tailor shops, ships' uniform stores, laundries, dry cleaning plants and cobbler shops. 	Ship's Servicemen manage barber shops, tailor shops, ships' uniform stores, laundries, dry cleaning plants and cobbler shops. 	Ship's Servicemen manage barber shops, tailor shops, ships' uniform stores, laundries, dry cleaning plants and cobbler shops. 	Ship's Servicemen manage barber shops, tailor shops, ships' uniform stores, laundries, dry cleaning plants and cobbler shops.
 	 	 	 	
 	Instructor 	IN 	(Instructor, Physical) 	INP
 	Physical Trainers operate gymnasiums aboard Starfleet starships and starbases and act as personal trainers to Starfleet personnel. 	Physical Trainers operate gymnasiums aboard Starfleet starships and starbases and act as personal trainers to Starfleet personnel. 	Physical Trainers operate gymnasiums aboard Starfleet starships and starbases and act as personal trainers to Starfleet personnel. 	Physical Trainers operate gymnasiums aboard Starfleet starships and starbases and act as personal trainers to Starfleet personnel.
 	 	 	 	
 	Librarian 	SM 	 	
 	Librarians are in charge of managing Starfleet libraries and assisting personnel in their use for both personal and professional matters. 	Librarians are in charge of managing Starfleet libraries and assisting personnel in their use for both personal and professional matters. 	Librarians are in charge of managing Starfleet libraries and assisting personnel in their use for both personal and professional matters. 	Librarians are in charge of managing Starfleet libraries and assisting personnel in their use for both personal and professional matters.
 	 	 	 	
 	Musician 	MU 	 	
 	Musicians play in bands aboard starbases and large Starfleet ground installations. 	Musicians play in bands aboard starbases and large Starfleet ground installations. 	Musicians play in bands aboard starbases and large Starfleet ground installations. 	Musicians play in bands aboard starbases and large Starfleet ground installations.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Operations) 	YNO
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Engineering==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Engineer's Mate 	EN 	 	
 	Engineer's Mates maintain propulsion machinery, including assigned auxiliary equipment propulsion control systems, electrical and electronic circuitry up to the printed circuit module, and alarm and warning circuitry. They also maintain refrigeration, air-conditioning, distilling-plant engines and compressors and other environmental control systems.	Engineer's Mates maintain propulsion machinery, including assigned auxiliary equipment propulsion control systems, electrical and electronic circuitry up to the printed circuit module, and alarm and warning circuitry. They also maintain refrigeration, air-conditioning, distilling-plant engines and compressors and other environmental control systems.	Engineer's Mates maintain propulsion machinery, including assigned auxiliary equipment propulsion control systems, electrical and electronic circuitry up to the printed circuit module, and alarm and warning circuitry. They also maintain refrigeration, air-conditioning, distilling-plant engines and compressors and other environmental control systems.	Engineer's Mates maintain propulsion machinery, including assigned auxiliary equipment propulsion control systems, electrical and electronic circuitry up to the printed circuit module, and alarm and warning circuitry. They also maintain refrigeration, air-conditioning, distilling-plant engines and compressors and other environmental control systems.
 	 	 	 	
 	Machinist's Mate 	MM 	 	
 	Machinist's Mates are responsible for the continuous operation of the many engines, compressors, gears, refrigeration, and air-conditioning equipment along with other types of machinery onboard ships and shore installations, as well as the maintenance of small craft. 	Machinist's Mates are responsible for the continuous operation of the many engines, compressors, gears, refrigeration, and air-conditioning equipment along with other types of machinery onboard ships and shore installations, as well as the maintenance of small craft. 	Machinist's Mates are responsible for the continuous operation of the many engines, compressors, gears, refrigeration, and air-conditioning equipment along with other types of machinery onboard ships and shore installations, as well as the maintenance of small craft. 	Machinist's Mates are responsible for the continuous operation of the many engines, compressors, gears, refrigeration, and air-conditioning equipment along with other types of machinery onboard ships and shore installations, as well as the maintenance of small craft.
 	 	 	 	
 	Damage Controlman 	DC 	 	
 	Damage Controlmen perform the work necessary for damage control, ship stability, and fire-fighting. They instruct personnel in damage control and CBR defense and repair damage-control equipment and systems. 	Damage Controlmen perform the work necessary for damage control, ship stability, and fire-fighting. They instruct personnel in damage control and CBR defense and repair damage-control equipment and systems. 	Damage Controlmen perform the work necessary for damage control, ship stability, and fire-fighting. They instruct personnel in damage control and CBR defense and repair damage-control equipment and systems. 	Damage Controlmen perform the work necessary for damage control, ship stability, and fire-fighting. They instruct personnel in damage control and CBR defense and repair damage-control equipment and systems.
 	 	 	 	
 	Transporter Technician 	TT 	 	
 	Transporter Technicians operate and maintain matter-transport systems and their associated auxiliary systems. 	Transporter Technicians operate and maintain matter-transport systems and their associated auxiliary systems. 	Transporter Technicians operate and maintain matter-transport systems and their associated auxiliary systems. 	Transporter Technicians operate and maintain matter-transport systems and their associated auxiliary systems.
 	 	 	 	
 	Hull Maintenance Technician 	HM 	 	
 	Hull Maintenance Technicians are responsible for maintaining ships' hulls, fittings, piping systems and machinery. They install and maintain all shipboard and shore based plumbing and piping systems. They look after a vessel's safety and survival equipment and operate workbees. 	Hull Maintenance Technicians are responsible for maintaining ships' hulls, fittings, piping systems and machinery. They install and maintain all shipboard and shore based plumbing and piping systems. They look after a vessel's safety and survival equipment and operate workbees. 	Hull Maintenance Technicians are responsible for maintaining ships' hulls, fittings, piping systems and machinery. They install and maintain all shipboard and shore based plumbing and piping systems. They look after a vessel's safety and survival equipment and operate workbees. 	Hull Maintenance Technicians are responsible for maintaining ships' hulls, fittings, piping systems and machinery. They install and maintain all shipboard and shore based plumbing and piping systems. They look after a vessel's safety and survival equipment and operate workbees.
 	 	 	 	
 	Builder's Mate 	BU 	 	
 	Builder's Mates are skilled construction personnel who build and repair all types of vessels, structures, and equipment, and work in shipboard fabrication facilities. 	Builder's Mates are skilled construction personnel who build and repair all types of vessels, structures, and equipment, and work in shipboard fabrication facilities. 	Builder's Mates are skilled construction personnel who build and repair all types of vessels, structures, and equipment, and work in shipboard fabrication facilities. 	Builder's Mates are skilled construction personnel who build and repair all types of vessels, structures, and equipment, and work in shipboard fabrication facilities.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Engineering) 	YNE
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Sciences==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Laboratory Technician 	LT 	 	
 	Laboratory Technicians assist science officers and specialists in performing experiments, maintaining laboratory and scientific computers, sensory gear, and equipment, and perform administrative duties. 	Laboratory Technicians assist science officers and specialists in performing experiments, maintaining laboratory and scientific computers, sensory gear, and equipment, and perform administrative duties. 	Laboratory Technicians assist science officers and specialists in performing experiments, maintaining laboratory and scientific computers, sensory gear, and equipment, and perform administrative duties. 	Laboratory Technicians assist science officers and specialists in performing experiments, maintaining laboratory and scientific computers, sensory gear, and equipment, and perform administrative duties.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Sciences) 	YNL
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Medical==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Hospital Corpsman 	HM 	 	
 	Hospital Corpsmen are medical professionals who provide health care to Starfleet personnel and their families. They serve as pharmacy technicians, medical technicians, nurse's aides, battlefield medics, and more. All work falls into several categories: first aid and minor surgery, patient transportation, patient care, prescriptions and laboratory work, food service inspections, and clerical duties.	Hospital Corpsmen are medical professionals who provide health care to Starfleet personnel and their families. They serve as pharmacy technicians, medical technicians, nurse's aides, battlefield medics, and more. All work falls into several categories: first aid and minor surgery, patient transportation, patient care, prescriptions and laboratory work, food service inspections, and clerical duties.	Hospital Corpsmen are medical professionals who provide health care to Starfleet personnel and their families. They serve as pharmacy technicians, medical technicians, nurse's aides, battlefield medics, and more. All work falls into several categories: first aid and minor surgery, patient transportation, patient care, prescriptions and laboratory work, food service inspections, and clerical duties.	Hospital Corpsmen are medical professionals who provide health care to Starfleet personnel and their families. They serve as pharmacy technicians, medical technicians, nurse's aides, battlefield medics, and more. All work falls into several categories: first aid and minor surgery, patient transportation, patient care, prescriptions and laboratory work, food service inspections, and clerical duties.
 	 	 	 	
 	Surgical Technician 	HMS 	 	
 	Surgical Technicians are highly specialized Corpsmen who are trained to assist surgeons in more complex procedures than the average Corpsman is prepared for. 	Surgical Technicians are highly specialized Corpsmen who are trained to assist surgeons in more complex procedures than the average Corpsman is prepared for. 	Surgical Technicians are highly specialized Corpsmen who are trained to assist surgeons in more complex procedures than the average Corpsman is prepared for. 	Surgical Technicians are highly specialized Corpsmen who are trained to assist surgeons in more complex procedures than the average Corpsman is prepared for.
 	 	 	 	
 	Pathologist's Assistant 	HMP 	 	
 	Pathologists assistants assist in autopsies and preparation for post-mortem ceremonies. 	Pathologists assistants assist in autopsies and preparation for post-mortem ceremonies. 	Pathologists assistants assist in autopsies and preparation for post-mortem ceremonies. 	Pathologists assistants assist in autopsies and preparation for post-mortem ceremonies.
 	 	 	 	
 	Counselor's Aide 	HMC 	 	
 	Counselor's Aides perform administrative duties to assist Starfleet counselors. 	Counselor's Aides perform administrative duties to assist Starfleet counselors. 	Counselor's Aides perform administrative duties to assist Starfleet counselors. 	Counselor's Aides perform administrative duties to assist Starfleet counselors.
 	 	 	 	
 	Medical Equipment Specialist 	HME 	 	
 	Medical Equipment Specialists are responsible for maintenance and repair of all medical technologies. 	Medical Equipment Specialists are responsible for maintenance and repair of all medical technologies. 	Medical Equipment Specialists are responsible for maintenance and repair of all medical technologies. 	Medical Equipment Specialists are responsible for maintenance and repair of all medical technologies.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Medical) 	YNM
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Intelligence==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Signalman 	SM 	(Signalman, Intelligence) 	(SMI)
 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems.
 	 	 	 	
 	Cryptological Technician 	CI 	(Interpretive Cryptological Technician)(Maintenance Cryptologic Technician)(Collection Cryptologic Technicians)(Technical Cryptologic Technicians) 	CTICTMCTRCTT
 	Cryptologic Technicians control the flow of messages and information. Their work depends on their special branch: CTIs or Interpretive Cryptologic Technicians handle coding and decoding of Federation and non-Federation communications. CTMs or Maintenance Cryptologic Technicians maintain electronic and electromechanical equipment. CTNs or Networking Cryptologic Technicians handle computer communication. CTRs or Collection Cryptologic Technicians handle all communications intercepts. Finally, CTTs or Technical Cryptologic Technicians handle all communications by non-traditional means.	Cryptologic Technicians control the flow of messages and information. Their work depends on their special branch: CTIs or Interpretive Cryptologic Technicians handle coding and decoding of Federation and non-Federation communications. CTMs or Maintenance Cryptologic Technicians maintain electronic and electromechanical equipment. CTNs or Networking Cryptologic Technicians handle computer communication. CTRs or Collection Cryptologic Technicians handle all communications intercepts. Finally, CTTs or Technical Cryptologic Technicians handle all communications by non-traditional means.	Cryptologic Technicians control the flow of messages and information. Their work depends on their special branch: CTIs or Interpretive Cryptologic Technicians handle coding and decoding of Federation and non-Federation communications. CTMs or Maintenance Cryptologic Technicians maintain electronic and electromechanical equipment. CTNs or Networking Cryptologic Technicians handle computer communication. CTRs or Collection Cryptologic Technicians handle all communications intercepts. Finally, CTTs or Technical Cryptologic Technicians handle all communications by non-traditional means.	Cryptologic Technicians control the flow of messages and information. Their work depends on their special branch: CTIs or Interpretive Cryptologic Technicians handle coding and decoding of Federation and non-Federation communications. CTMs or Maintenance Cryptologic Technicians maintain electronic and electromechanical equipment. CTNs or Networking Cryptologic Technicians handle computer communication. CTRs or Collection Cryptologic Technicians handle all communications intercepts. Finally, CTTs or Technical Cryptologic Technicians handle all communications by non-traditional means.
 	 	 	 	
 	Intelligence Specialist 	IS 	 	
 	Intelligence Specialists are involved in collecting and interpreting intelligence, especially secret information about enemies or potential enemies. They analyze photographs and prepare charts, maps, and reports that describe in detail the strategic situation all over known space. 	Intelligence Specialists are involved in collecting and interpreting intelligence, especially secret information about enemies or potential enemies. They analyze photographs and prepare charts, maps, and reports that describe in detail the strategic situation all over known space. 	Intelligence Specialists are involved in collecting and interpreting intelligence, especially secret information about enemies or potential enemies. They analyze photographs and prepare charts, maps, and reports that describe in detail the strategic situation all over known space. 	Intelligence Specialists are involved in collecting and interpreting intelligence, especially secret information about enemies or potential enemies. They analyze photographs and prepare charts, maps, and reports that describe in detail the strategic situation all over known space.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Intelligence) 	YNI
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Starfighter Operations==
Insignia	General Rating 	Abbreviation 	Service Rating 	Abbreviation
 	Electronic Warfare Specialist 	EW 	 	
 	Electronic Warfare Specialists are responsible for operating ECM and ECCM equipment aboard Spaceborne Warning and Control Systems (SWACS) craft in support of starfighter operations. 	Electronic Warfare Specialists are responsible for operating ECM and ECCM equipment aboard Spaceborne Warning and Control Systems (SWACS) craft in support of starfighter operations. 	Electronic Warfare Specialists are responsible for operating ECM and ECCM equipment aboard Spaceborne Warning and Control Systems (SWACS) craft in support of starfighter operations. 	Electronic Warfare Specialists are responsible for operating ECM and ECCM equipment aboard Spaceborne Warning and Control Systems (SWACS) craft in support of starfighter operations.
 	 	 	 	
 	Aviation Ordnance Mate 	AOM 	 	
 	Aviation Ordnance Mates are responsible for the maintenance and outfitting of weaponry on Starfighters, including Phasers, disruptors, missiles, and torpedoes, as well as for keeping supply records for these 	Aviation Ordnance Mates are responsible for the maintenance and outfitting of weaponry on Starfighters, including Phasers, disruptors, missiles, and torpedoes, as well as for keeping supply records for these 	Aviation Ordnance Mates are responsible for the maintenance and outfitting of weaponry on Starfighters, including Phasers, disruptors, missiles, and torpedoes, as well as for keeping supply records for these 	Aviation Ordnance Mates are responsible for the maintenance and outfitting of weaponry on Starfighters, including Phasers, disruptors, missiles, and torpedoes, as well as for keeping supply records for these
 	 	 	 	
 	Aircrew Survival Equipmentman 	ASE 	 	
 	Aircrew Survival Equipmentmen are personnel tasked with the maintenance of all survival equipment aboard starfighters and their associated support craft. 	Aircrew Survival Equipmentmen are personnel tasked with the maintenance of all survival equipment aboard starfighters and their associated support craft. 	Aircrew Survival Equipmentmen are personnel tasked with the maintenance of all survival equipment aboard starfighters and their associated support craft. 	Aircrew Survival Equipmentmen are personnel tasked with the maintenance of all survival equipment aboard starfighters and their associated support craft.
 	 	 	 	
 	Deckman 	DN 	(Deckman, Starfighter) 	DNS
 	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in hangerbays. 	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in hangerbays. 	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in hangerbays. 	Deckmen are responsible for all non-Engineering-related flight deck operations, including the operation of fuel transfer systems, launch and recovery operations, and traffic direction in hangerbays.
 	 	 	 	
 	Sensor Technician 	ST 	(Sensor Technican, Starfighter) 	STS
 	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems.	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems.	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems.	Sensor Technician's operate and maintain external sensory gear, and are responsible for tracking objects and assisting in scientific operations, as well as for operating the sensor-jamming portions of Electronic Counter-Measures (ECM) systems.
 	 	 	 	
 	Signalman 	SM 	(Signalman, Starfighter) 	SMS
 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems. 	Signalmen operate and maintain internal and external communications systems and operate the communications-jamming portions of Electronic Counter-Measures (ECM) systems.
 	 	 	 	
 	Aviation Boatswain's Mate 	ABM 	 	
 	Aviation Boatswain's Mates are in charge of maintenance and operation of launch and recovery systems. 	Aviation Boatswain's Mates are in charge of maintenance and operation of launch and recovery systems. 	Aviation Boatswain's Mates are in charge of maintenance and operation of launch and recovery systems. 	Aviation Boatswain's Mates are in charge of maintenance and operation of launch and recovery systems.
 	 	 	 	
 	Yeoman 	YN 	(Yeoman, Starfighter) 	YNF
 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports. 	Yeomen perform secretarial and clerical work. They deal with visitors, calls and incoming communiqués. They organize files and order and distribute supplies. They write notices, directives, forms and reports.
==Marines==
Starfleet Marines do not use the rating system owing to the variation in their rank structure. Instead they use the Military Occupational Specialty codes, or MOS.
==Sources==
United States Navy Ratings at Wikipedia
==Notes==
: See: Icarus Phoenix's Design Notes
Category:Insignia
Category:Starfleet Insignia
Category:Enlisted Ratings