Glossary

Maritime glossary, terms beginning with R (page 7)

All maritime glossary terms that begin with the letter R, drawn from every subject section. 2097 entries.

Showing 250 of 2097 terms (page 7 of 9).

RIVO X42. Offshore Wind Installation and Cable Lay: Reference Dutch acronym; included for context.
Riyadh Convention X114. Maritime Arbitration and Shipping Law Firms: 1983 Arab convention on judicial cooperation relevant to enforcement in the Middle East.
Riyadh MoU A7. Compliance, certification and enforcement: PSC regime for Gulf Cooperation Council region.
Riyadh MOU Member States X66. Port State Control and Regional MOUs: Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates.
RM (Residual Marine) X149. Marine Fuels, Bunkering, and Alternative Fuels: The ISO 8217 designation prefix for residual marine fuel grades (for example RMG 380).
RM Young 5106 X89. ECDIS and Bridge Equipment Makers: Mechanical marine anemometer from R. M. Young Company widely used as a wind sensor.
RMA 10 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: ISO 8217 residual grade with maximum viscosity 10 cSt at 50 C.
RMA 10 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A low-viscosity residual grade with a maximum viscosity of 10.00 mm2/s at 50 degrees C.
RMB 30 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 30 cSt at 50 C.
RMB 30 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A residual grade with a maximum viscosity of 30.00 mm2/s at 50 degrees C.
rMCM X77. Naval Mine Warfare and Mine Countermeasures: The Replacement Mine Countermeasures Vessel program led by Belgium Naval and Robotic Systems for twelve ships, with the lead vessel Oostende delivered in 2024.
RMD 80 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 80 cSt at 50 C.
RMD 80 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A residual grade with a maximum viscosity of 80.00 mm2/s at 50 degrees C.
RME 180 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 180 cSt at 50 C, low residue.
RME 180 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A residual grade with a maximum viscosity of 180.0 mm2/s at 50 degrees C, with tighter cat-fine limits than RMG 180.
RMG X15. Ports, Terminals and Stevedoring: Rail Mounted Gantry, yard crane on fixed rails.
RMG (Rail-Mounted Gantry) X46. Container Terminal Operations: A portal crane running on fixed rails, used in stacking yards or intermodal yards for high-density storage and rail transfer.
RMG 180 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 180 cSt at 50 C.
RMG 180 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: The most widely traded residual grade with a maximum viscosity of 180.0 mm2/s at 50 degrees C.
RMG 380 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 380 cSt at 50 C, the workhorse pre-2020 HSFO.
RMG 380 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A residual grade with a maximum viscosity of 380.0 mm2/s at 50 degrees C and historically the dominant bunker grade for slow-speed engines.
RMG 500 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 500 cSt at 50 C.
RMG 500 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A residual grade with a maximum viscosity of 500.0 mm2/s at 50 degrees C.
RMG 700 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Residual grade with maximum viscosity 700 cSt at 50 C.
RMK 380 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Higher-density residual grade, max density 1010 kg/m3 at 15 C.
RMK 380 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A heavy residual grade with a maximum density of 1.010 kg/m3 at 15 degrees C and maximum viscosity of 380.0 mm2/s at 50 degrees C.
RMK 500 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: RMK grade at 500 cSt nominal viscosity.
RMK 500 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: A heavy residual grade with maximum density of 1.010 kg/m3 and maximum viscosity of 500.0 mm2/s at 50 degrees C.
RMK 700 X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: RMK grade at 700 cSt nominal viscosity.
RMK 700 (ISO 8217) X149. Marine Fuels, Bunkering, and Alternative Fuels: The heaviest standard residual grade with maximum viscosity of 700.0 mm2/s at 50 degrees C.
RMMV X77. Naval Mine Warfare and Mine Countermeasures: The Remote Multi-Mission Vehicle, a Lockheed Martin semi-submersible diesel-powered tow platform for AN/AQS-20A operations.
RMRS X52. Polar Code, Arctic and Antarctic Shipping: Russian Maritime Register of Shipping, the classification society defining the Arc and Ice ice categories.
RMRS (Russian Maritime Register of Shipping) X27. Polar Code, Ice Navigation and Polar Operations: Russian classification society; sets RMRS ice classes used by Russian Arctic fleet.
RMS Lusitania X60. Marine Salvage and Wreck Removal: British liner sunk in 1915 off Ireland with subsequent commercial salvage attempts.
RMS Titanic X60. Marine Salvage and Wreck Removal: White Star liner sunk in April 1912, surveyed by Ballard in 1985 and subject to limited artifact recovery thereafter.
RMT X102. Seafarer Welfare and Maritime Charities: National Union of Rail, Maritime and Transport Workers, UK union formed in 1990 by merger of NUR and the National Union of Seamen.
RNLI X80. Maritime Search and Rescue Coordination: Royal National Lifeboat Institution, UK and Ireland volunteer lifeboat service since 1824.
RO X98. Ship Registries and Flag States: Recognized Organization.
RO Code X7. Flag State, Port State Control and Detention Vocabulary: Code for Recognized Organizations, see entry above.
RO Performance List X146. Port State Control Regimes, MoUs, and Inspection Systems: The Paris MoU and Tokyo MoU annual ranking of recognized organizations based on detention performance.
Ro-Boom X60. Marine Salvage and Wreck Removal: Inflatable oil containment boom designed for open water use.
Ro-pax X15. Ports, Terminals and Stevedoring: roll-on/roll-off passenger ferry.
Ro-Pax (Ro-Ro Passenger) B5. Ship Types and Individual Vessels: Combined cargo/passenger ferry.
Ro-Ro X6. Container, Intermodal and Trade Codes: Roll-on/Roll-off vessel for wheeled cargo, occasionally combined with container decks.
Ro-Ro (Roll-on Roll-off) B5. Ship Types and Individual Vessels: Wheeled cargo vessel.
Ro-Ro Casualty X60. Marine Salvage and Wreck Removal: Salvage of roll on roll off vessels, frequently complicated by free surface, vehicle cargo fires, and stability challenges.
Ro-ro passenger ship damage stability X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: SOLAS II-1/8-1 (MSC.216(82) and MSC.421(98)) includes Stockholm Agreement-derived water-on-deck calculations.
Road CMR C3. Logistics, freight forwarding and multimodal trade: Convention on the Contract for the International Carriage of Goods by Road.
Road Survey Heavy Cargo X104. Project Cargo Forwarders and Heavy Transport: Drive through of a haul route with measurement of clearances and surfaces.
Road Tanker X75. IMDG Code, Classes, Packing and Segregation: Tank vehicle regulated under ADR for road carriage and not normally exchanged with IMDG portable tanks during sea legs.
Road Town X35. Yacht and Superyacht Industry: Capital of the BVI and seat of the Virgin Islands Shipping Registry.
Road Vehicle X75. IMDG Code, Classes, Packing and Segregation: Vehicle used as a CTU for IMDG carriage subject to lashing and packing rules of CSS and CTU codes.
Roads X15. Ports, Terminals and Stevedoring: outer anchorage area.
Roads of the Rhine X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: Informal designation of the navigation channel of the Rhine, divided into the Upper, Middle, and Lower Rhine, plus the Waal and Lek branches in the Netherlands.
Roald Amundsen X128. Sail Training Ships and Tall Ship Associations: German two masted brig built 1952 at Rosslau as an East German tanker Vilm and rebuilt 1992 to 1993, 50 m length, operates as a youth sail training vessel.
Roald Amundsen Center X133. Polar Research Vessels and Polar Code Regimes: UiT Norwegian Centre for Arctic Studies, Tromso.
Roam Plan (Starlink) X68. Maritime Satcom and Telecommunications: Starlink global mobility plan available for maritime users with the appropriate hardware.
Roaming Agreement X68. Maritime Satcom and Telecommunications: Commercial agreement permitting a satellite terminal to use another operator's network.
Roanoke X39. Pre-1900 Maritime History: English colony on the present-day North Carolina coast attempted in 1585 and 1587.
Roaring Forties D1. Physical and chemical oceanography and marine meteorology: Strong westerly winds between 40 and 50 degrees south.
Roaring Forties Sediment Drift D2. Hydrography, tides, waves, bathymetry and marine geology: Contourite drift built by strong Southern Ocean currents.
Roatan X64. Cruise Industry Operators, Brands and Ships: Honduran Caribbean island cruise port.
ROB X6. Container, Intermodal and Trade Codes: Remaining on Board.
ROB (Remaining On Board) X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Quantity of fuel in tanks at the moment of survey.
ROB Acceptance Letter X115. Marine Bunker and Cargo Surveying: Letter signed by receiver or surveyor accepting the remaining-on-board figure following discharge.
ROB Survey X115. Marine Bunker and Cargo Surveying: Survey conducted to quantify remaining on board fuel or cargo after a discharge or before a bunker top-up.
ROB Verification X86. Port Agency, Husbandry and Disbursement: Verification of remaining-on-board fuel quantity, often by bunker survey.
Robert Allan Ltd X30. Tug Operations and Harbour Towage: Canadian naval architecture firm in Vancouver specializing in tug design.
Robert Allan Ltd Towmaster X137. Harbour Tugs, Towage Operators and Tug Builders: Internal design tool used by RAL for towage performance simulation.
Robert Allan Vancouver Office X137. Harbour Tugs, Towage Operators and Tug Builders: RAL's Vancouver British Columbia headquarters and principal design center.
Robert Clifford X132. High-Speed Craft, Hydrofoils and Ferry Operators: Founder and chairman of Incat Tasmania, Tasmanian shipbuilder and original architect of the wave-piercing catamaran.
Roberts Sinto X88. Marine Surface Preparation and Coatings Application: Manufacturer of foundry and blast cleaning equipment including centrifugal wheel blasters.
Robertson AP9MK3 X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: Heritage Robertson (Simrad) autopilot widely deployed on commercial vessels.
Robin des Bois X50. Ship Recycling, Demolition and Hong Kong Convention: The French environmental NGO that publishes detailed reports on ship demolition activity and beaching practices.
Robins Dry Dock and Repair Co v Flint, 275 US 303 (1927) X143. Landmark Maritime Law Cases and Doctrines: US Supreme Court bar on pure economic loss for negligence to property of another.
Roboat X109. Maritime Autonomous Surface Ships and MASS Code: The Amsterdam Institute for Advanced Metropolitan Solutions and MIT autonomous canal boat research platform.
Robosys Voyager X109. Maritime Autonomous Surface Ships and MASS Code: The Robosys Automation Vessel Intelligence Voyager autonomy product line for unmanned and reduced crew vessels.
Robotic welding B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Robot arms used in panel lines.
Robotics for Marine Industry Symposium X119. Maritime Conferences, Trade Shows and Awards: Annual robotics event held at Plymouth University.
ROC X21. STCW Certificates, Crewing and Seafarer Welfare: Restricted Operator Certificate.
ROC (Restricted Operator's Certificate) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: GMDSS qualification for Sea Area A1 operations only, under STCW IV/2.
Rochester Cable X122. Submarine Cable Laying, Repair Vessels and Operators: Hexatronic subsidiary in Rochester, New York producing unrepeatered submarine cable.
Rock Berm X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Engineered mound of rock placed over a cable or pipeline using fall-pipe vessels for impact protection or stabilization.
Rock dredger X124. Dredging Industry and Reclamation Contractors: CSD configured with rock cutter head and heavier ladder for igneous and limestone.
Rock dumping X42. Offshore Wind Installation and Cable Lay: Placement of graded rock for scour protection or cable protection using flexible fallpipe vessels.
Rock Dumping Vessel E4. Cruise, offshore energy and auxiliary/specialised fleets: Fall-pipe vessel installing rock cover.
Rock Fall Pipe Vessel (RFPV) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Specialized vessel delivering controlled rock placement onto subsea pipelines and cables.
Rock placement vessel X42. Offshore Wind Installation and Cable Lay: Specialized side stone dumping or flexible fallpipe vessel installing graded rock for scour or cable protection.
Rocker arm X19. Engine Room Watchkeeping and UMS Operations: Lever transmitting cam motion to valve stem on four stroke engines.
Rocket Motor X75. IMDG Code, Classes, Packing and Segregation: UN 0186 Class 1.3C or UN 0280 Class 1.1B depending on construction and content.
Rockfish X10. Marine Biology, Fisheries and Oceanography: Members of the genus *Sebastes*; many species are long-lived.
Rockhopper Gear X87. Fishing Vessels and Fisheries Management: Ground gear with rubber discs designed to roll over rocky bottom.
Rockhopper Penguin X97. Polar Expedition Cruise and IAATO Operations: Crested penguin (Eudyptes chrysocome / E. moseleyi) found on subantarctic islands including the Falklands.
Rockpiper X124. Dredging Industry and Reclamation Contractors: Boskalis fall-pipe vessel of 25,500 t rock capacity.
Rockwell FactoryTalk X107. Maritime Cybersecurity and OT Security: Suite of industrial software from Rockwell Automation.
RoCom X42. Offshore Wind Installation and Cable Lay: Reference command and control system.
Rod (Lashing) X9. Cargo Securing, Lashing and Stability Vocabulary: See Lashing Rod.
Rod Length X9. Cargo Securing, Lashing and Stability Vocabulary: Critical for fit-up to specific tier; double rods for upper tiers, single rods lower.
Rode X3. Ship Handling, Seamanship and Deck Vocabulary: Anchor cable.
Rodent Bait Station X41. Cruise Ship Public Health and VSP/USPH: Tamper-resistant device positioned outside food areas as part of the pest management program.
Rodriquez Cantieri Navali X132. High-Speed Craft, Hydrofoils and Ferry Operators: Messina-based Italian builder of RHS 70, RHS 140, RHS 150 and RHS 200 surface-piercing hydrofoils, in administration from 2010.
Roebuck, HMS X39. Pre-1900 Maritime History: Royal Navy fifth-rate frigate of 1690 in which William Dampier made his 1699 to 1701 Pacific voyage.
Roger Hanson X108. Marine Insurance and P&I Clubs: A senior London average adjuster, historically associated with major casualty adjustments.
Rogue Access Point X48. Maritime Cybersecurity: Unauthorized wireless device that creates an attack path into shipboard networks.
Rogue wave X10. Marine Biology, Fisheries and Oceanography: Wave with crest height greater than twice the significant wave height.
Role Based Access Control X48. Maritime Cybersecurity: Access model in which permissions are assigned to roles rather than individual users.
Role-Based Access Control (RBAC) X139. Maritime Cybersecurity, OT Threats and Standards: Access model required by IEC 62443-3-3 SR 2.1.
Rolex Fastnet Race X84. Yacht Racing, Regattas and Sailing Governance: The biennial offshore race organized by RORC since 1925, sponsored by Rolex.
Rolex Sydney Hobart F4. Recreational Boating, Yachting and Sport: 628-mile Australian offshore race since 1945.
Rolex Sydney Hobart Yacht Race X84. Yacht Racing, Regattas and Sailing Governance: The annual 628-nautical-mile race from Sydney to Hobart, first run in 1945 and sponsored by Rolex.
Roll B1. Naval Architecture: Rotational motion about the longitudinal axis.
Roll Amplitude X9. Cargo Securing, Lashing and Stability Vocabulary: Half the peak-to-peak roll motion.
Roll damping X162. Naval Architecture, Stability, Resistance, and Structural Design: Sum of wave-radiation, viscous skin friction, eddy-making, lift, and bilge-keel damping that limits resonant roll amplitude.
Roll damping coefficient B1. Naval Architecture: Decay parameter from inclining or free-decay tests.
Roll Decay Test X54. Naval Architecture Software and IACS Rules: Free decay experiment used to estimate roll damping in tank tests and ShipMo3D validation.
Roll Limit X31. Helicopter Operations on Ships: Maximum permissible vessel roll angle, typically 3 degrees for unrestricted operations.
Roll Mop (Galley) X120. Marine Catering, Provisions and Ship Chandlers: IMPA 174123 mop and bucket combo for galley cleaning.
Roll on roll off C3. Logistics, freight forwarding and multimodal trade: RoRo loading and discharging.
Roll on roll off ferry X19. Engine Room Watchkeeping and UMS Operations: Vessel with vehicle decks and specific ER fire detection requirements.
Roll On Roll Off Project X104. Project Cargo Forwarders and Heavy Transport: Loading or discharge of project cargo on wheels rather than by lift.
Roll Over X49. Ship Finance, Leasing and Maritime Capital Markets: Continuation of a drawn loan into a new interest period at the borrower's election.
Roll Period X9. Cargo Securing, Lashing and Stability Vocabulary: Time for one complete oscillation; approximated by T = 2 pi k / sqrt(g GM).
Roll Trailer X169. Container Terminal Cranes, Yard Equipment, and Lashing: Wheeled platform with a gooseneck coupling used in RoRo terminals to carry cassettes, containers, and breakbulk units, also called a Mafi trailer.
Roll-On Roll-Off (Ro-Ro) X9. Cargo Securing, Lashing and Stability Vocabulary: Cargo mode using wheeled units; subject to CSS Code Annex 4.
Roll-On/Roll-Off (Ro-Ro) Ramp X94. Port Machinery and Quay Equipment Makers: Stern, side, or quarter ramp on a ro-ro ship matched to the quay or linkspan for vehicle handling.
Roll-stabilizer X35. Yacht and Superyacht Industry: Active fin or gyro system reducing yacht roll at anchor and underway.
Rolla Propellers X125. Superyacht Industry, Builders and Brokers: Swiss propeller manufacturer common to large motoryachts.
Rolldock Sea X81. Project Cargo, Heavy-Lift and Module Carriers: Rolldock heavy-lift vessel.
Rolldock Shipping X81. Project Cargo, Heavy-Lift and Module Carriers: Netherlands-based heavy-lift operator combining lift-on/lift-off, roll-on/roll-off and float-on/float-off capability.
Rolldock Star X81. Project Cargo, Heavy-Lift and Module Carriers: Rolldock heavy-lift vessel.
Rolldock Storm X81. Project Cargo, Heavy-Lift and Module Carriers: Rolldock heavy-lift vessel.
Rolldock Sun X81. Project Cargo, Heavy-Lift and Module Carriers: Rolldock heavy-lift vessel.
Roller X45. Marine Paints, Coatings and Antifouling: Application method used for small areas and touch-up; limited to manufacturer-permitted film build.
Roller Bogie X104. Project Cargo Forwarders and Heavy Transport: Wheeled bogie placed under long project units for short on-deck moves.
Roller chock X3. Ship Handling, Seamanship and Deck Vocabulary: Mooring chock with rollers.
Roller Gate X103. US Inland Waterway Towing and Barge: A type of dam crest gate used on portions of the Upper Mississippi River.
Roller Gear X87. Fishing Vessels and Fisheries Management: Heavy ground gear with steel rollers for trawling on hard bottom.
Roller-pump WEC X57. Ocean Energy Beyond Wind: Generic class of mechanical wave converters that drive hydraulic pumps via rolling motion.
Rolling cargo C3. Logistics, freight forwarding and multimodal trade: RoRo cargo such as cars or trailers.
Rolling hitch B3. Nautical Science: Knot used to take strain on tensioned line.
Rolling Lashing X9. Cargo Securing, Lashing and Stability Vocabulary: Lashing arrangement permitting controlled angular motion.
Rolling Period Calculation X9. Cargo Securing, Lashing and Stability Vocabulary: Method in IS Code 2008 weather criterion.
Rollover X20. LNG Operations and Custody Transfer: Spontaneous density inversion in LNG storage tanks causing rapid BOG release; mitigated by recirculation and stratification monitoring.
Rollover LNG X56. LNG/LPG Carriers and IGC Code: Sudden mixing of stratified LNG layers of different density, causing rapid vapor release.
Rolls-Royce Bergen B Engine X67. Marine Electrical Systems and Shore Power: Medium-speed marine diesel and dual-fuel engine, formerly Rolls-Royce, now Bergen Engines AS owned by Langley Holdings.
Rolls-Royce Bergen C Engine X67. Marine Electrical Systems and Shore Power: Medium-speed marine gas and diesel engine from Bergen Engines AS.
Rolls-Royce Commercial Marine X79. Tugs and Towage Industry: Former marine division of Rolls-Royce supplying azimuth thrusters and propulsion to tugs, divested to Kongsberg Maritime in 2019.
Rolls-Royce Kamewa waterjet B2. Marine Engineering: Waterjet propulsion family.
Rolls-Royce Marine X63. Marine Auxiliary Machinery and Pumps: Marine equipment division (now Kongsberg Maritime) producing steering gear and propulsion equipment.
Rolls-Royce Marine Customer Day X119. Maritime Conferences, Trade Shows and Awards: Held periodically at Bergen Engines and Kongsberg sites.
Rolls-Royce Mermaid B2. Marine Engineering: Podded propulsor (legacy).
Rolls-Royce MT30 X11. Naval Vessels, Warship Systems and Naval Architecture: Marine gas turbine on Queen Elizabeth, Constellation, and LCS-1.
Rolls-Royce Power Systems X90. Marine Engine Specific Model Enumeration: Holding division that owned MTU from 2014 until the planned spinoff completed in subsequent restructuring.
Rolls-Royce Submarines X91. Submarines and Submarine Cable Systems: UK supplier of naval pressurized water reactors and submarine propulsion components.
Rolls-Royce US 205 X137. Harbour Tugs, Towage Operators and Tug Builders: Z-drive azimuth thruster commonly fitted to escort and ASD tugs (now Kongsberg US 205).
Rolls-Royce US 255 X137. Harbour Tugs, Towage Operators and Tug Builders: Larger Z-drive thruster for high BP escort tugs.
ROM 0.5-05 C4. Ports, terminals and coastal/marine civil engineering: Spanish maritime works recommendation for geotechnical actions.
ROM 2.0-11 C4. Ports, terminals and coastal/marine civil engineering: Spanish maritime works recommendation for design of berthing and mooring areas.
ROM 3.1-99 C4. Ports, terminals and coastal/marine civil engineering: Spanish maritime works recommendation for design of maritime navigation channels.
Roman Imperial Fleet F1. Maritime History: Classis Misenensis and Classis Ravennas standing fleets.
Roman Wrecks of Madrague de Giens F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Wine-amphora carrier excavated 1972 onward.
Romania PSC X66. Port State Control and Regional MOUs: Paris MOU and Black Sea MOU member State.
Romanian Naval Academy Mircea cel Batran X55. Marine Simulators, Training and Maritime Academies: Romanian military maritime academy in Constanta, training naval officers and merchant navy cadets.
Romanian Naval Authority X98. Ship Registries and Flag States: Flag administration of Romania for ship registration matters.
Rome X64. Cruise Industry Operators, Brands and Ships: Italian capital city served by the cruise port of Civitavecchia.
Rome I Regulation (EC 593/2008) X51. Maritime Arbitration, Law and BIMCO Clauses: The European Union regulation on the law applicable to contractual obligations.
Rome II Regulation (EC 864/2007) X51. Maritime Arbitration, Law and BIMCO Clauses: The European Union regulation on the law applicable to non-contractual obligations.
Romeo Flag F5. The Reference Layer: Glossary, Units, Signals and Information Sources: International Code of Signals letter R.
Romeo Foxtrot Flag F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Two-letter group; many ICS combinations.
ROMS X175. Port Engineering, Dredging, Breakwaters, and Quays: Regional Ocean Modeling System, a free-surface, terrain-following ocean circulation model widely used for coastal studies.
Rona X128. Sail Training Ships and Tall Ship Associations: UK Bermudan ketch, used by Ocean Youth Trust and London Sailing Project, key training platform from the 1970s onward.
Ronald Reagan (USS) CVN-76 X106. Naval Surface Combatants: Ninth Nimitz-class aircraft carrier, commissioned 2003.
Rönner Group X113. Drydock and Ship Repair Yards: German maritime group acquiring Lloyd Werft Bremerhaven in 2023 to continue cruise and commercial repair operations.
Roodzant Reederij X137. Harbour Tugs, Towage Operators and Tug Builders: Smaller Dutch harbour towage operator.
Roof Bow X83. ISO Container Manufacturing and Leasing: Detachable transverse member supporting the canvas of an open-top container.
Roof Panel X83. ISO Container Manufacturing and Leasing: Single-piece pressed steel roof of a dry container.
Room service X24. Cruise, Passenger Ship and Ferry Operations: Cabin food and beverage delivery, typically 24-hour on cruise ships.
Roosevelt Island Tidal Energy X57. Ocean Energy Beyond Wind: RITE, the Verdant Power demonstration in the East River, New York City.
Roosevelt SUNY Maritime X121. Maritime Education, Academies and Universities: See SUNY Maritime College.
Roosevelt, USCGC (WMSL-758) X130. National Coast Guards and Cutter Fleets: Ninth Legend-class National Security Cutter, commissioned 2021, homeported North Charleston, South Carolina.
Root cause X12. Maritime Casualties and Investigation: Underlying factor whose correction would prevent recurrence of the casualty pathway.
Root Cause Analysis X25. Maritime Cybersecurity, OT and IT: Investigation method to determine the underlying cause of an incident.
Root Cause Analysis Procedure X40. Tanker Vetting, SIRE and VIQ: The operator's documented method for investigating incidents, referenced under TMSA Element 9.
Root section X42. Offshore Wind Installation and Cable Lay: Inboard cylindrical end of a wind turbine blade with bolted root joint to the hub.
Rootkit X48. Maritime Cybersecurity: Malware that conceals its presence on a host and resists removal.
RoPax X34. Decarbonization, Alternative Fuels and Carbon Pricing: Roll-on/roll-off passenger vessel category with early uptake of LNG and battery-hybrid propulsion.
Rope access X59. Offshore Wind O&M, CTVs and SOVs: IRATA qualified work at height technique used for blade and tower repair without scaffolding.
Rope Diameter, Pilot Ladder X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: ISO 799-1 requirement that pilot ladder side ropes have a minimum 18 millimeter diameter of manila or equivalent.
Rope guard X38. Propellers, Stern Gear and Shaft Lines: Disc or sleeve covering the gap between propeller hub and aft stern-tube seal to prevent rope ingress.
Rope Guard Anode X100. Marine Cathodic Protection and Anodes: A sacrificial anode mounted on the rope guard ahead of the propeller to protect the stern bossing and shaft area.
Rope Reeving X169. Container Terminal Cranes, Yard Equipment, and Lashing: Path of the hoist rope through the trolley, headblock, and crane structure sheaves that multiplies hoist force and divides hook speed.
Rope Stopper X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Short line used to hold a mooring rope while transferring it from the winch drum to a bitt.
Rope Tail X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: See Mooring Tail.
Rope test X15. Ports, Terminals and Stevedoring: tensile testing of mooring lines per ISO 2307.
Rope Trawl X87. Fishing Vessels and Fisheries Management: Pelagic trawl with rope sections in the wings to filter water and herd fish toward the cod end.
Rope Walk X39. Pre-1900 Maritime History: A long covered structure where ship's rope was laid up by hand, examples preserved at Chatham and Portsmouth.
RORC F4. Recreational Boating, Yachting and Sport: Royal Ocean Racing Club, founded 1925.
RoRo X73. Marine Hydrography, Charting and ENC: Roll-on roll-off vessel, relevant to berthing-scale ENC depiction of linkspan structures.
RoRo Cargo X1. Cargo Science, Commodities and Cargo Care: Rolling cargo (cars, trucks, mafi) loaded via ramps.
RoRo Cargo Survey X43. Marine Surveying and Warranty Surveying: An attendance for roll-on roll-off cargo focusing on lashing, stowage, ventilation, and fire safety compliance.
RoRo Inland X33. Inland Navigation and Barge Operations: Roll-on roll-off inland vessel for trailers and project cargo.
RoRo Lane-Recognition AI E3. Technology, digitalization and smart shipping: Vision system for vehicle deck operations.
RoRo ramp C4. Ports, terminals and coastal/marine civil engineering: Stern, side, or quarter ramp for RoRo operations.
Rosatomflot X27. Polar Code, Ice Navigation and Polar Operations: Operating arm of Rosatom for nuclear-powered civilian icebreakers.
Roscoff X59. Offshore Wind O&M, CTVs and SOVs: French port supporting O&M activities for wind farms off the coast of Brittany.
Rosenlew Container X83. ISO Container Manufacturing and Leasing: Finnish heritage container brand, historically built specialty containers for the European market.
Rosenmund mooring X15. Ports, Terminals and Stevedoring: rare; omitted to avoid fabrication.
Rosette Strain Gauge X96. Hull Integrity Monitoring and Strain Gauges: Strain gauge with multiple grids at fixed angles used to determine principal strains.
Rosin-based binder X45. Marine Paints, Coatings and Antifouling: Soluble matrix used in controlled depletion polymer antifoulings.
Roskilde Viking Ship Museum F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Danish institution housing the Skuldelev finds.
Rosneft X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A Russian state oil company subject to U.S. sectoral sanctions and EU restrictive measures.
Rosneft Bunker X72. Bunkering Hubs and Bunker Suppliers: Russian bunker subsidiary RN Bunker active at Novorossiysk, Tuapse, Nakhodka, and Vladivostok prior to 2022 EU sanctions.
Rosneft Marine UK X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: An entity subject to wind-down general licenses post-2022.
Rosneftegaz X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: Rosneft's holding company, designated to constrain alternative payment pathways.
Ross Sea X97. Polar Expedition Cruise and IAATO Operations: Remote and expensive Antarctic destination accessed via New Zealand, encompassing McMurdo Sound and the Ross Ice Shelf.
Ross Sea Polynya D5. Coastal processes, sea-level, cryosphere and ocean observation science: Major polynya in front of the Ross Ice Shelf.
Ross seal X10. Marine Biology, Fisheries and Oceanography: *Ommatophoca rossii*, an Antarctic phocid.
Rossby Number D1. Physical and chemical oceanography and marine meteorology: Ratio of inertial to Coriolis forces.
Rossby radius of deformation X10. Marine Biology, Fisheries and Oceanography: Length scale over which buoyancy and Coriolis effects balance, controlling eddy size.
Rossby Wave D1. Physical and chemical oceanography and marine meteorology: Large-scale wave owing its existence to the variation of Coriolis with latitude.
Rossinavi X35. Yacht and Superyacht Industry: Italian aluminum-superyacht builder in Viareggio.
Rossiya X133. Polar Research Vessels and Polar Code Regimes: Lead ship of Russian Project 10510 Leader class, keel laid 2021 at Zvezda yard.
Rossiya, Project 10510 X52. Polar Code, Arctic and Antarctic Shipping: Lead ship of the Lider LK-120Ya class under construction at Zvezda Shipyard from 5 July 2021.
Rosslare X85. Ferries, Ro-Pax Operators and Routes: Irish Wexford port hosting Stena Line, Irish Ferries, and Brittany Ferries to Pembroke, Cherbourg, Fishguard, and Bilbao.
Roster system X32. Marine Pilotage and Pilot Operations: Sequential dispatch of pilots from a station list.
Rostislav Alekseyev X132. High-Speed Craft, Hydrofoils and Ferry Operators: Soviet designer of the Raketa, Meteor, Kometa and Voskhod hydrofoils.
Rostock X85. Ferries, Ro-Pax Operators and Routes: German Baltic port hosting Stena Line, TT-Line, Scandlines, and Finnlines services.
Rosyth Dockyard X113. Drydock and Ship Repair Yards: Babcock-operated Royal Navy facility on the Firth of Forth used for carrier assembly and frigate refit.
Rosyth Ship Recycling X118. Ship Recycling Yards, Beaches and Regulation: Babcock-operated UK facility dismantling Royal Navy vessels at Rosyth Dockyard.
Rotary Sail Era F1. Maritime History: Early twentieth-century Flettner rotor experiments.
Rotary Vane Pump X63. Marine Auxiliary Machinery and Pumps: Positive displacement pump using sliding vanes in a rotor, used for fuel and lube oil duty.
Rotary vane steering gear X19. Engine Room Watchkeeping and UMS Operations: Compact steering gear with vanes inside a stator providing rudder torque.
Rotating Disc Electrode X61. Marine Lubricants and Cylinder Oils: Spectroscopic technique that vaporizes a sample film for elemental analysis without acid digestion.
Rotating equipment C4. Ports, terminals and coastal/marine civil engineering: Pumps, compressors, and turbines at terminals.
Rotating spreader X15. Ports, Terminals and Stevedoring: spreader allowing 360-degree container rotation.
Rotation Plan X86. Port Agency, Husbandry and Disbursement: Plan for a vessel's port rotation, shared with all agents.
Rotation Schedule (Stores) X120. Marine Catering, Provisions and Ship Chandlers: Cook's plan based on FEFO and FIFO, audited during ISM Code internal audits.
Rotational Speed Detector X83. ISO Container Manufacturing and Leasing: Sensor on reefer compressor monitoring shaft speed during pre-trip inspection.
Rotational viscometer X47. Marine Fuel Quality and ISO 8217: Laboratory viscometer of cone-and-plate or concentric cylinder type used for residual fuels at process temperature.
Rothera Research Station X133. Polar Research Vessels and Polar Code Regimes: BAS year-round Antarctic Peninsula station, Adelaide Island, served by Sir David Attenborough.
ROTI X89. ECDIS and Bridge Equipment Makers: Rate of Turn Indicator, IMO mandated for ships of 50,000 GT and above by SOLAS V/19.
Rotinanga FLNG X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Generic designation occasionally used in proposed FLNG developments in Asian basins.
Rotodynamic Pump X63. Marine Auxiliary Machinery and Pumps: Pump using rotating element to add kinetic energy, including centrifugal and axial flow types.
Rotor X42. Offshore Wind Installation and Cable Lay: Combined assembly of hub and blades on a wind turbine.
Rotor cap (turbo) B2. Marine Engineering: Component of turbocharger rotor assembly.
Rotor diameter X42. Offshore Wind Installation and Cable Lay: Tip to tip distance of the swept rotor, ranging from approximately 150 m to over 250 m on current offshore platforms.
Rotor Earth Fault X67. Marine Electrical Systems and Shore Power: Insulation failure in the rotor winding of a marine synchronous generator, detected by dedicated relays.
Rotor lock X59. Offshore Wind O&M, CTVs and SOVs: Mechanical device immobilizing the rotor during major interventions in the nacelle.
Rotor Sail D6. Decarbonization, emissions and alternative fuels: See Flettner Rotor.
Rotor Sail Verification X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: An emerging SIRE 2.0 check for vessels fitted with Flettner rotor wind-assisted propulsion.