Ratings Terms and Definitions
Catergories Terms Descriptions
Ratings AB Able Seaman
Ratings Able Seaman (AB) Senior unlicensed member of the deck department that stands watch and completes other deck duties.
Ratings Able Seaman Any waters, unlimited Need definition
Ratings Able Seaman-MODU Need definition
Ratings Able Seaman-Sail Need definition
Ratings Able Seaman-Special Need definition
Ratings Able Seaman-Special (OSV) Need definition
Ratings AE Assitant Engineer
Ratings AGT Any Gross Tons
Ratings AHP Any Horsepower
Ratings Any Gross Tons (AGT) Any Gross Tons
Ratings Any Horsepower (AHP) Any Horsepower
Ratings Any Unlic Deck Rtg Except AB Need definition
Ratings Any Unlic Deck Rtg Incl AB Need definition
Ratings Any Unlicensed Engine Rating/should show how it is usually abbreviated Endorsement for engineer officers that hold an endorsement with a HP of 2000 or higher which allow them to work in any unlicensed rating in the engine department.
Ratings Apprentice engineer Need definition
Ratings Apprentice mate Need definition
Ratings Apprentice mate (Steersman) An individual who is qualified to perform watchkeeping on the bridge while in training onboard a towing vessel, under the direct supervision and in the presence of a master or mate (pilot) of towing vessels.
Ratings ARPA Auto Radar Plotting Aides
Ratings Assistant engineer (limited) Qualified officer in the engine department.
Ratings Assistant Engineer MODU Qualifed officer in the engine department restricted to service on a MODU.
Ratings Assistant engineer uninspected fishing industry vessels Qualifed officer in the engine department restricted to service on uninspected fishing industry vessels.
Ratings Ballast Control Operator (BCO) Officer restricted to service on MODU's whose duties involve the operation of the complex ballast system found on many MODU's. When assigned to a MODU a BCO is equivalent to a mate on a conventional vessel.
Ratings Barge supervisor (BS) Officer restricted to service on MODU's whose duties involve support to the OIM in marine-related matters including, but not limited to, maintaining watertight integrity, inspecting and maintaining mooring and towing components, and maintaining emergency and other marine-related equipment. A barge supervisor, when assigned to a MODU, is equivalent to a Mate on a conventional vessel.
Ratings BCO Ballast Control Manager
Ratings Boatswain Need definition
Ratings BRM Bridge Resource Management
Ratings BS Barge Supervisor
Ratings BST Basic Safety Training
Ratings Cadet Endorsment for individual for either deck or engine who is currently enrolled in a maritime academy.
Ratings CE Chief Engineer
Ratings Chief Engineer (CE) Any person responsible for the mechanical propulsion of a vessel and who is the holder of a valid officer endorsement as chief engineer.
Ratings Chief engineer (limited - oceans) Any person responsible for the mechanical propulsion of a vessel and who is the holder of a valid officer endorsement as chief engineer (limited) and is limited internationally to a vessel that is not more that 1600 GRT.
Ratings Chief engineer (limited) Need definition
Ratings Chief engineer (limited-near-coastal) Any person responsible for the mechanical propulsion of a vessel and who is the holder of a valid officer endorsement as chief engineer (limited) and is limited internationally to a vessel that is not more that 1600 GRT and Near Coastal waters.
Ratings Chief engineer MODU Person responsible for the mechanical propulsion of a vessell and who is the holder of a valid officer endorsment as Chief Engineer that is restricted to service on a MODU.
Ratings Chief engineer offshore supply vessel Any person responsible for the mechanical propulsion of a vessel and who is the holder of a valid officer endorsement as Chief Engineer that is restricted to service on an offshore supply vessel.
Ratings Chief engineer uninspected fishing industry vessels Any person responsible for the mechanical propulsion of a vessel and who is the holder of a valid officer endorsement as Chief Engineer that is restricted to service on uninspected fishing industry vessels.
Ratings Chief Mate Need definition
Ratings Chief mate of offshore supply vessels Deck Officer who is next in seniority to the master of a vessel restricted to an offshore supply vessel.
Ratings Chief purser Certificate of Registry - person on the ship who is responsible for the handling of money on board.
Ratings CO Chief Officer
Ratings Coalpasser Need definition
Ratings Dangerous Liquid Liquefied Gas (DL/LG) Dangerous Liquid Liquefied Gas
Ratings DDE Need definition
Ratings Deck Cadet Need definition
Ratings Deck engine mechanic QMED rating
Ratings Deck Engine Utility (DEU) Deck Engine Utility
Ratings Deck engineer QMED rating
Ratings Deck Officer - Apprentice Mate (Steersman) Need definition
Ratings Deck Officer - Chief Mate Need definition
Ratings Deck Officer - First Class Pilot Need definition
Ratings Deck Officer - Limited Apprentice Mate (Steersman) Need definition
Ratings Deck Officer - Limited Master Need definition
Ratings Deck Officer - Master Need definition
Ratings Deck Officer - Mate Need definition
Ratings Deck Officer - Mate (Pilot) Need definition
Ratings Deck Officer - Second Mate Need definition
Ratings Deck Officer - Third Mate Need definition
Ratings Deck Watch Officer (military only) (DWO) Deck Watch Officer (military only)
Ratings Designated Duty Engineer (DDE) A Qualifed engineer, who may be the sole engineer on vessels with a periodically unattended engine room.
Ratings DEU Deck Engine Utility
Ratings DL/LG Dangerous Liquid Liquefied Gas
Ratings DP Dynamically Positioned
Ratings DWO Deck Watch Officer (military only)
Ratings Dynamically Positioned (DP) Dynamically Positioned - does this mean anything? If so, add def. If not, delete.
Ratings Electrician QMED rating
Ratings Endorsement Supplemental page used to add additional endorsements that inserts into the MMC.
Ratings Engine Cadet Need definition
Ratings Engineer Officer - Assistant Engineer Need definition
Ratings Engineer Officer - Assistant Engineer (Limited-Oceans) Need definition
Ratings Engineer Officer - Chief Engineer Need definition
Ratings Engineer Officer - Chief Engineer (Limited-Near Coastal) Need definition
Ratings Engineer Officer - Chief Engineer (Limited-Oceans) Need definition
Ratings Engineer Officer - Chief Engineer (OSV) Need definition
Ratings Engineer Officer - Designated Duty Engineer Need definition
Ratings Engineer Officer - Engineer (OSV) Need definition
Ratings Engineer Officer - First Assistant Engineer Need definition
Ratings Engineer Officer - Second Assistant Engineer Need definition
Ratings Engineer Officer - Third Assistant Engineer Need definition
Ratings Engineer offshore supply vessel Qualifed officer in the engine department restricted to service on an offshore supply vessel.
Ratings Engineman QMED rating
Ratings EWO Engine Watch Officer (military only)
Ratings FCP First Class Pilot
Ratings FG (FGN) Foreign Oceans
Ratings FH Food Handler
Ratings Fireman QMED rating
Ratings First Aid Provider Need definition
Ratings First assistant engineer Engineer officer next in seniortiy to the chief engineer and upon whom the responsibility for the mechanical propulsion of the vessel will fall in the event of the incapacity of the chief engineer.
Ratings First class pilot Individual holding this endorsement is qualified to act as master on a vessel within a specific endorsed route.
Ratings GIWW Radar Observer (Inland Waters and Gulf-Intracoastal Waterway
Ratings GL Great Lakes
Ratings GMDSS-At Sea Maintainer Domestic and STCW endorsment that authorizes at sea repair and maintence of GMDSS equipment.
Ratings GMDSS-Radio Operator Domestic and STCW endorsement that authorizes the individual to operate GMDSS equipment aboard a GMDSS equipped vessel.
Ratings Great Lakes Need definition
Ratings Hospital Corpsman Certificate of Registry
Ratings IN (INL) Inland
Ratings Junior Assistant purser Certificate of Registry -endorsement for person on the ship who is responsible for the handling of money on board.
Ratings Junior engineer QMED rating
Ratings Lifeboatman Endorsement authorizing individual to operate a lifeboat and or life raft aboard a vessel within domestic waters.
Ratings Limitations A line on the MMC that limits an officer and or rating endorsement.
Ratings Limited Need definition
Ratings Limited Apprentice Mate (Steersman) A mariner who is qualified to perform watchkeeping on the bridge while in training onboard a towing vessel, under the direct supervision and in the presence of a master or mate (pilot) of towing vessels. This endorsement is limited to a specific route.
Ratings Limited Capacity Need definition
Ratings Limited Master The officer having command of the vessel who is restricted to a limited route.
Ratings Lower level A category of deck and engineer officer endorsements established for the assessment of fees. Lower-level officer endorsements are other than those defined as upper-level, for which the requirements are listed in Title, 46 CFR part 11 subpart D, E and G.
Ratings Machinist QMED rating
Ratings Marine physician Assistant Certificate of Registry
Ratings Master The officer having command of the vessel.
Ratings Master (pilot) of Towing Vessel Need definition
Ratings Master of offshore supply vessels Officer having command of a vessel that is restricted to service on an offshore supply vessel.
Ratings Master of Towing Vessel Deck officer authorized to have command of a towing vessel.
Ratings Master of uninspected fishing industry vessels Officer having command that is restricted to service on uninspected fishing industry vessels.
Ratings Mate Qualified officer in the deck department other than the master.
Ratings Mate (pilot) of towing vessel Qualifed deck officer in the deck department of towing vessel.
Ratings Mate of offshore supply vessels Qualified officer in the deck department other than the master restricted to service on offshore supply vessels.
Ratings Mate of uninspected fishing industry vessels Qualified officer in the deck department other than the master restricted to service on uninspected fishing industry vessels.
Ratings Medical doctor Certificate of Registry
Ratings Medical first aid provider Endorsement authorizing an individual to provide first aid aboard a vessel.
Ratings MODU Mobile Offshore Drilling Unit
Ratings MRO Medical Review Officer
Ratings MV Motor Vessels
Ratings NC Near Coastal
Ratings Near Coastal Need definition
Ratings Ocean Need definition
Ratings OCMI Officer in Charge of Marine Inspection
Ratings Officer Endorsement An annotation on a merchant mariner credential that allows a mariner to serve in the capacities listed in Title 46, CFR 10.109(a). The officer endorsement serves as the license and/or certificate of registry.
Ratings Officer in charge of a navigational watch (OICNW) Officer in charge of a navigational watch
Ratings Officer in Charge of Marine Inspection (OCMI) Officer in Charge of Marine Inspection
Ratings Officer in Charge of Marine Inspection (OICEW) Officer in charge of an engineering watch in a manned engineroom or designated duty engineer in a periodically unmanned engineroom.
Ratings Officer in Charge of Navigational Watch (OICNM) Officer in Charge of Navigational Watch
Ratings Officer of Deck (military only) (OOD) Officer of Deck (military only) - just reiterated. Need def
Ratings Offshore installation manager (OIM) Officer restricted to service on MODU's. An assigned offshore installation manager is wquivalent to a maser on a conventional vessel and is the person designated by the owner or operator to be in complete and ultimate command of the unit.
Ratings Offshore Supply Vessel (OSV) Offshore Supply Vessel
Ratings OICEW Officer in charge of an engineering watch in a manned engineroom or designated duty engineer in a periodically unmanned engineroom.
Ratings OICNM Officer in Charge of Navigational Watch
Ratings OICNW Officer in charge of a navigational watch
Ratings OIM Offshore Installation Manager
Ratings OOD Officer of Deck (military only)
Ratings Operator Need definition
Ratings Operator of uninspected passenger vessels (OUPV) An individual qualified to operate a certain uninspected vessels carrying no more than 6 passengers and a vessel of less than 100 GRT.
Ratings Operator of Uninspected Passenger Vessels (OUPV) Operator of Uninspected Passenger Vessels
Ratings Ordinary seaman Unlicensed member of the deck department that stands watch and completes other deck duties.
Ratings Ordinary Seaman (OS) Ordinary Seaman
Ratings OS Ordinary Seaman
Ratings OSV Offshore Supply Vessel
Ratings OUPV Operator of Uninspected Passenger Vessels
Ratings OUPV - Limited Operator Need definition
Ratings OUPV - Operator Need definition
Ratings Person in Charge (PIC) Person in Charge
Ratings Person in charge of medical care Endorsement authorizing a person to be in charge if medical care aboard a vessel.
Ratings PIC Person in Charge
Ratings Pilot of Towing Mate Pilot of Towing
Ratings Professional nurse Certificate of Registry
Ratings Proficiency in fast rescue boats Endorsement authorizing to operate fast rescue boats.
Ratings PSC Proficiency in survival craft and rescue boats other than fast rescue boats endorsed internationally.
Ratings Pumpman QMED rating
Ratings Purser Certificate of Registry -endorsement for person on the ship who is responsible for the handling of money on board.
Ratings Qualified member of the engine department (QMED) Senior unlicensed member of the engine room that stands watch and completes other engine room duties.
Ratings Qualified Rating Various categories of able-seaman, qualified member of the engine department, Lifeboatman or tankerman endorsements formerly issued on merchant mariner's documents.
Ratings Radar Observer Endorsement authorizing use of radar on board radar equipped vessels and can be limited to a specific route such as Inland or Rivers.
Ratings Radar Observer (Inland Waters and GIWW: Renewal) Need definition
Ratings Radar Observer (Rivers) Need definition
Ratings Radar Observer (Unlimited) Need definition
Ratings Radar Observer (Unlimited: Renewal) Need definition
Ratings Radio Officer A person who holds an MMC with an officer endorsement listed in Title 46, CFR 10.109(a)(33).
Ratings Radio officer Individual holding this endorsement is qualifed to operate radio on vessel.
Ratings Rating Endorsement An annotation on a merchant mariner credential that allows a mariner to serve in the capacities listed in Title 46, CFR 10.109(b) and (c). The rating endorsement serves as the merchant mariner's document.
Ratings Refrigerating engineer QMED rating
Ratings Restricted tankerman PIC Individual with this restricted endorsement is considered to be person in charge (PIC) of conducting transfers of dangerous liquids or liquified gas from a tank barge to another tank barge, ship and or tank. The restriction limits mariner to a certain vessl or liquid.
Ratings Restricted tankerman PIC (Barge) Individual with this restricted endorsement is considered to be person in charge (PIC) of conducting transfers of dangerous liquids or liquified gas from a tank barge to another tank barge, ship and or tank. The restriction limits mariner to a certain vessl or liquid.
Ratings Restrictions A line on the MMC that restricts an officer or rating endorsement.
Ratings RFPEW Rating forming part of a watch in a manned engineroom or designated to perform duties in a periodically unmanned engineroom.
Ratings RFPNW Rating forming part of a navigational watch. Is there more to this like the RFPEW?
Ratings River Need definition
Ratings S/M/GT Steam/Motor/Gas Turbine
Ratings SD Stewart Department
Ratings Second assistant engineer Engineer officer next in seniortiy to the first assistant engineer and upon whom the responsibility for the mechanical propulsion of the vessel.
Ratings Second Mate Operational level deck officer who is next in seniority to the Chief Mate.
Ratings Senior Assistant purser Certificate of Registry -endorsement for person on the ship who is responsible for the handling of money on board.
Ratings Special Need definition
Ratings Special (OSV) Need definition
Ratings Staff Officer A person who holds an MMC with an officer endorsement listed in Title 46, CFR 10.109(a)(35-42).
Ratings Staff Officer - Chief Purser Need definition
Ratings Staff Officer - Chief Purser; Hospital Corpsman Need definition
Ratings Staff Officer - Chief Purser; Marine Physician Assistant Need definition
Ratings Staff Officer - Hospital Corpsman Need definition
Ratings Staff Officer - Junior Assist Purser; Hospital Corpsman Need definition
Ratings Staff Officer - Junior Assist Purser; Marine Phys Assist Need definition
Ratings Staff Officer - Junior Assistant Purser Need definition
Ratings Staff Officer - Marine Physician Assistant Need definition
Ratings Staff Officer - Medical Doctor Need definition
Ratings Staff Officer - Professional Nurse Need definition
Ratings Staff Officer - Purser Need definition
Ratings Staff Officer - Purser; Hospital Corpsman Need definition
Ratings Staff Officer - Purser; Marine Physician Assistant Need definition
Ratings Staff Officer - Senior Assist Purser; Hospital Corpsman Need definition
Ratings Staff Officer - Senior Assist Purser; Marine Phys Assist Need definition
Ratings Staff Officer - Senior Assistant Purser Need definition
Ratings Standards of Training, Certifications, and Watchkeeping (STCW) The International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, as amended.
Ratings STCW Standards of Training, Certifications, and Watchkeeping is the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, as amended.
Ratings Steersman Apprentice Mate of Steersman of Towing Vessels
Ratings Steward's department (F.H.) The department of the vessel that includes entertainment personnel, including wait staff, housekeeping staff, and galley workers. May also be referred to as members of the hotel department on a large passenger vessel.
Ratings Stewards Dept Need definition
Ratings Student observer Need definition
Ratings Tankerman assistant Individual with this endorsement assists the Tankerman-PIC in conducting transfers of dangerous liquids or liquified gas from a tankship / barge to another tank barge, ship and or tank.
Ratings Tankerman engineer Individual with this endoresement is responsible for the maintence and repair of cargo equipment.
Ratings Tankerman PIC Individual with this endorsement is considered to be person in charge (PIC) of conducting transfers of dangerous liquids or liquified gas from a tankship to another ship, tank barge or tank.
Ratings Tankerman PIC (Barge) Individual with this endorsement is considered to be person in charge (PIC) of conducting transfers of dangerous liquids or liquified gas from a tank barge to another tank barge, ship and or tank.
Ratings Tankerman-Engr (Barge) Need definition
Ratings Third assistant engineer Engineer officer next in seniortiy to the second assistant engineer and upon whom the responsibility for the mechanical propulsion of the vessel.
Ratings Third Mate Operational level deck officer who is next in seniority to the Second Mate.
Ratings UFIV Uninspected Fishing Vessels
Ratings Upper level A category of deck and engineer officer endorsements established for the assessment of fees. Upper-level officer endorsements are those for which the requirements are listed in Title 46, CFR 11.404 to 11.407, 11.510, 11.512, 11.514 and 11.516.
Ratings VSO Vessel Security Officer
Ratings Watertender QMED rating
Ratings Wiper Unlicensed member of the engine room that may stand watch and complete other engine room duties.
Ratings WR Western Rivers
Ratings Z Card Need definition