Glossary

Maritime glossary, terms beginning with R

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

Showing 250 of 2097 terms (page 1 of 9).

R L Kalthia Ship Breaking Pvt Ltd X118. Ship Recycling Yards, Beaches and Regulation: Alang plot operator with long-running activity; HKC SoC status to be confirmed with Class.
R-12 Refrigerant Inventory X50. Ship Recycling, Demolition and Hong Kong Convention: The IHM Part I record of CFC-12 in legacy refrigeration installations.
R-1234yf X63. Marine Auxiliary Machinery and Pumps: Tetrafluoropropene refrigerant with low global warming potential used in newer reefer applications.
R-134a X63. Marine Auxiliary Machinery and Pumps: Tetrafluoroethane refrigerant used in marine air-conditioning and provision plants.
R-134a Reefer X136. Reefer Vessels and Cool Chain Operators: HFC refrigerant historically dominant in reefer containers, being phased out under the Kigali Amendment.
R-22 Refrigerant Inventory X50. Ship Recycling, Demolition and Hong Kong Convention: The IHM Part I record of HCFC-22 refrigerant installations.
R-29RMU Sineva X11. Naval Vessels, Warship Systems and Naval Architecture: Russian Liquid-propellant SLBM on Delta IV.
R-404A X63. Marine Auxiliary Machinery and Pumps: HFC refrigerant blend widely used in reefer container units and provision rooms.
R-404A Reefer X136. Reefer Vessels and Cool Chain Operators: HFC refrigerant blend with very high GWP, retained in some Magnum reefer units for low temperature performance.
R-407C X70. Reefer Containers and Cold Chain Shipping: HFC refrigerant blend used as a transitional substitute for R-22 in some refrigeration applications.
R-407F X63. Marine Auxiliary Machinery and Pumps: HFC refrigerant blend used in some marine refrigeration plants.
R-410A X63. Marine Auxiliary Machinery and Pumps: HFC refrigerant blend used in some marine air-conditioning plants.
R-507A X70. Reefer Containers and Cold Chain Shipping: HFC refrigerant blend used in low-temperature commercial refrigeration, with high GWP, subject to phase-down.
R-717 X63. Marine Auxiliary Machinery and Pumps: Ammonia refrigerant used in industrial fish factory and large refrigeration plants.
R-723 X70. Reefer Containers and Cold Chain Shipping: Azeotrope of ammonia and dimethyl ether used in selected industrial refrigeration applications.
R-744 X63. Marine Auxiliary Machinery and Pumps: Carbon dioxide refrigerant used in reefer container units and transcritical refrigeration plants.
R-744 Reefer X136. Reefer Vessels and Cool Chain Operators: CO2 refrigerant used in Carrier NaturaLINE units, eliminating HFC content.
R-Mode X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Ranging-mode service investigated by IALA using MF radio beacons, AIS and eLoran as a GNSS backup.
R-Mode 1 X109. Maritime Autonomous Surface Ships and MASS Code: A DNV autonomous and remote operations notation level corresponding to remote monitoring.
R-Mode 2 X109. Maritime Autonomous Surface Ships and MASS Code: A DNV notation level corresponding to remote control.
R-Mode 3 X109. Maritime Autonomous Surface Ships and MASS Code: A DNV notation level corresponding to fully autonomous operation.
R/A Pilot X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Rendezvous Anchorage pilot, a designation in some ports for the pilot who boards at an offshore anchorage.
R/V (Research Vessel) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Ship dedicated to scientific research.
R134a X19. Engine Room Watchkeeping and UMS Operations: HFC refrigerant common in AC plants, phased down under MARPOL Annex VI Regulation 12.
R290 (propane) X26. Reefer Containers and Cold Chain Logistics: Hydrocarbon natural refrigerant, GWP 3, ASHRAE A3 flammable; limited container use.
R2Sonic 2020 X65. ROVs, AUVs, USVs and Marine Robotics: Compact wideband multibeam echo sounder from R2Sonic for shallow water survey.
R2Sonic 2022 X65. ROVs, AUVs, USVs and Marine Robotics: Mid-range R2Sonic multibeam echo sounder.
R2Sonic 2024 X65. ROVs, AUVs, USVs and Marine Robotics: R2Sonic ultra-wideband multibeam echo sounder for survey and offshore applications.
R2Sonic 2026 X65. ROVs, AUVs, USVs and Marine Robotics: High-frequency variant of the R2Sonic 2024 with extended angular coverage.
R2Sonic 2030 X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Deepwater variant of the R2Sonic family operating at lower frequencies for greater depth coverage.
R2Sonic Truepix X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Backscatter snippet processing technology in R2Sonic systems for higher-fidelity seabed imagery.
R3 / R3S / R4 / R4S / R5 Chain X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Successive high-strength chain grades defined for offshore mooring, with R5 being the highest standard mass-produced grade.
R3 Studless Chain X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Mooring chain grade R3 used in offshore catenary mooring systems.
R4 AIS X89. ECDIS and Bridge Equipment Makers: Saab Transponder Tech AIS Class A and AtoN transponder family.
R4 Studless Chain X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Mooring chain grade R4 with higher strength used in deepwater taut-leg moorings.
R404A X19. Engine Room Watchkeeping and UMS Operations: HFC blend used in provision and reefer refrigeration.
R404A, R407F, R449A, R452A, R513A X26. Reefer Containers and Cold Chain Logistics: See HFC entries.
R407F X19. Engine Room Watchkeeping and UMS Operations: Lower GWP HFC blend used as drop in for R404A.
R410A X19. Engine Room Watchkeeping and UMS Operations: HFC blend used in some AC plants.
R5 SOLAS X89. ECDIS and Bridge Equipment Makers: Saab AIS Class A transponder approved for SOLAS use.
R5 Studless Chain X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Mooring chain grade R5 used in the highest demand deepwater mooring systems.
R5 Supreme X89. ECDIS and Bridge Equipment Makers: Saab AIS Class A SOTDMA transponder with combined GNSS and navigation interface.
R507 X19. Engine Room Watchkeeping and UMS Operations: HFC blend used in low temperature refrigeration.
R600a (isobutane) X26. Reefer Containers and Cold Chain Logistics: Hydrocarbon refrigerant, GWP under 5, used in some small refrigeration appliances; not in container reefers.
R717 X19. Engine Room Watchkeeping and UMS Operations: Ammonia refrigerant used on reefer carriers and some chillers.
R744 X19. Engine Room Watchkeeping and UMS Operations: Carbon dioxide refrigerant used in modern reefer container and cruise installations.
RA (Rock Armor) X122. Submarine Cable Laying, Repair Vessels and Operators: Heaviest submarine cable armor class with two layers of large diameter steel wires and additional outer serving, used in rocky surf zones and below 50 m where dragging anchors threaten cable…
RAA X117. Marine Insurance Markets, Captives and Reinsurance: Reinsurance Association of America, the US trade body for reinsurers, publisher of US reinsurance market statistics.
RAAF X22. Piracy, Maritime Security and Armed Protection: Rapid Alert and Reporting Format used by UKMTO and MSCHOA for incident messages.
Raahe X92. Marine Steel Suppliers and Shipbuilding Plate: SSAB integrated steelworks in Finland producing heavy plate including specialty grades.
RAC X88. Marine Surface Preparation and Coatings Application: Reversible Airless Changer, the Graco trade name for reversible airless spray tips that allow clearing without removal.
Race Bank X42. Offshore Wind Installation and Cable Lay: UK offshore wind farm off Norfolk operated by Orsted.
Race Built X39. Pre-1900 Maritime History: Term for the new lower, sleeker English galleon design championed by John Hawkins in the 1570s.
Race Committee X84. Yacht Racing, Regattas and Sailing Governance: The team of officials running a regatta on the water.
Race For Fish X87. Fishing Vessels and Fisheries Management: Competitive Olympic style derby under aggregate TAC, largely superseded by IFQ systems.
RACE II Clause X117. Marine Insurance Markets, Captives and Reinsurance: The Radioactive Contamination, Chemical, Biological, Bio-Chemical and Electromagnetic Weapons Exclusion Clause, used in many marine wordings.
Race Officer F4. Recreational Boating, Yachting and Sport: World Sailing certified race official.
Race Week X35. Yacht and Superyacht Industry: Sailing regatta series; in superyachting, includes Antigua Sailing Week and Loro Piana Superyacht Regatta.
Rachel Crawford X104. Project Cargo Forwarders and Heavy Transport: Founder of Project Cargo Network (PCN), established in London in 2010.
RACI Matrix X40. Tanker Vetting, SIRE and VIQ: A responsibility assignment matrix used in TMSA documentation to clarify roles for shore and ship functions.
Racing Rules of Sailing (RRS) F4. Recreational Boating, Yachting and Sport: World Sailing rulebook updated quadrennially.
Racking Test X83. ISO Container Manufacturing and Leasing: Strength test imposing transverse load on container end frames to certify racking resistance.
Racon B3. Nautical Science: Radar transponder marking AtoNs.
Radar F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Radio detection and ranging device required by SOLAS V/19.
Radar (Fishing Vessel) X87. Fishing Vessels and Fisheries Management: Required under SOLAS Chapter V for larger vessels and routinely fitted on smaller commercial fishing vessels.
Radar (X-band) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: SOLAS V/19.2.3.2 requires 9 GHz radar on all ships of 300 GT and upwards; ships of 3,000 GT and above require additional 3 GHz or 9 GHz radar.
Radar Altimeter D2. Hydrography, tides, waves, bathymetry and marine geology: Satellite instrument measuring sea surface height by radar.
Radar Carriage X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: SOLAS V/19 requirement for one or two 9 GHz radars depending on ship size, with 3 GHz radar required above 3,000 GT.
Radar conspicuous pilot boat X32. Marine Pilotage and Pilot Operations: Radar reflector or active radar target on the pilot launch for visibility.
Radar Gauge X20. LNG Operations and Custody Transfer: Primary level gauge; FMCW microwave inside still pipe, Saab/Honeywell/Endress+Hauser supply.
Radar mile B3. Nautical Science: 6.18 microseconds round-trip time.
Radar Navigation Management X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Table A-II/2 competence in radar use at management level.
Radar Navigation Management Level X160. Maritime Academies, Universities, and STCW Certification: STCW A-II/2 module covering radar, ARPA, and decision making for chief mates and masters.
Radar Navigation Operational X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Table A-II/1 competence in radar use at operational level.
Radar Navigation Operational Level X160. Maritime Academies, Universities, and STCW Certification: STCW A-II/1 module covering radar, ARPA, and target tracking competence for OOW level.
Radar Observer X21. STCW Certificates, Crewing and Seafarer Welfare: US Coast Guard endorsement for officers using radar on US flagged ships.
Radar Observer Course X55. Marine Simulators, Training and Maritime Academies: U.S. Coast Guard-approved course meeting Title 46 CFR Part 11 for radar endorsements.
Radar Plot Extractor E3. Technology, digitalization and smart shipping: Software converting raw radar into tracks.
Radar plotting X16. Nautical Science, Navigation and COLREGs: Manual or automatic determination of target motion and CPA.
Radar plotting sheet B3. Nautical Science: Manoeuvring board used for manual plotting.
Radar Range Update X86. Port Agency, Husbandry and Disbursement: Update to vessel of changes in port radar coverage or VTS arrangements.
Radar Reflector F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Passive device enhancing radar return.
Radar SART X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Search and Rescue Transponder operating in the 9.2 to 9.5 GHz X-band, producing 12 inward-moving blips on radar.
Radar Search X80. Maritime Search and Rescue Coordination: Pattern using radar detection rather than visual lookout.
Radar shadow X16. Nautical Science, Navigation and COLREGs: Area shielded from radar by high ground or structures.
Radar Simulator X144. Bridge Simulators, Engine Room Simulators, and Maritime Training Equipment: STCW A-II/1 mandatory radar trainer.
Radar Simulator Course X55. Marine Simulators, Training and Maritime Academies: Course aligned with IMO Model Course 1.07 covering radar plotting and ARPA usage in a simulator environment.
Radar Spoofing X48. Maritime Cybersecurity: Injection or modification of radar returns to mislead operators or automated tracking systems.
Radar Survey X5. Marine Surveying and Inspection: Performance and equipment standards check of navigational radars.
Radar Tank Gauge X115. Marine Bunker and Cargo Surveying: Tank level measurement device using microwave reflection, used in cargo and bunker tank measurement systems.
Radar Target Enhancer (RTE) X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Active device that amplifies and retransmits radar signals to increase effective radar cross section.
Radar Target Tracker X109. Maritime Autonomous Surface Ships and MASS Code: The processing chain that maintains tracks of radar returns over time for use by the autonomy collision avoidance module.
Radar transponder X15. Ports, Terminals and Stevedoring: shore-based AIS aid in pilotage waters.
Radar transponder (SART) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: 9 GHz device per LSA Code 4.1.5.7, with at least one carried on each side of ships of 500 GT and upwards.
RadarPilot 1100 X89. ECDIS and Bridge Equipment Makers: SAM Electronics radar workstation within NACOS Platinum.
Radarsat Constellation Mission (RCM) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Canadian SAR satellite constellation.
RADARSAT-2 X27. Polar Code, Ice Navigation and Polar Operations: Canadian C-band SAR satellite (2007); workhorse for ice charting until RCM.
Radascan X14. Offshore Oil and Gas Marine Operations: Guidance Marine microwave DP reference using transponders.
Radial dispersion X16. Nautical Science, Navigation and COLREGs: Spread of bearings about a mean.
Radial Flow Pump X63. Marine Auxiliary Machinery and Pumps: Centrifugal pump with impeller delivering fluid radially, the most common pump type for high head duty.
Radial HF Radar Data D5. Coastal processes, sea-level, cryosphere and ocean observation science: Component data from HF radar.
Radial Inter-Array Cable X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Inter-turbine cable arrangement in which turbines are connected in series back to an offshore substation.
Radial Load Crane X104. Project Cargo Forwarders and Heavy Transport: Force exerted by a crawler crane along the radius from its slewing center.
Radial Saw Cutting X60. Marine Salvage and Wreck Removal: Mechanical cutting of jacket members and risers during decommissioning.
Radiale X124. Dredging Industry and Reclamation Contractors: Belgian inland dredging segment.
Radiance Class X164. Cruise Industry, Brands, Ship Classes, and Terminals: A Royal Caribbean class of four ships including Radiance, Brilliance, Serenade, and Jewel of the Seas.
Radiance of the Seas X64. Cruise Industry Operators, Brands and Ships: First Royal Caribbean Radiance-class ship delivered in 2001.
Radiation Budget D1. Physical and chemical oceanography and marine meteorology: Net difference between incoming and outgoing radiation at a surface.
Radiation force B1. Naval Architecture: Force on a body from its own induced waves.
Radiation Survey X28. Ship Recycling and End-of-Life: Pre-cutting survey for radioactive components in level gauges and smoke detectors.
Radiator (engine) B2. Marine Engineering: Air-blast cooler used on some small craft.
Radio bearing X16. Nautical Science, Navigation and COLREGs: Bearing determined by direction-finding equipment.
Radio Buoy X91. Submarines and Submarine Cable Systems: Submarine-released buoy enabling delayed RF transmission of recorded messages.
Radio direction finder (RDF) X16. Nautical Science, Navigation and COLREGs: Receiver with directional antenna for taking radio bearings.
Radio Equipment Disposal X50. Ship Recycling, Demolition and Hong Kong Convention: The Part III stores treatment of GMDSS radio equipment, including battery banks and EPIRBs.
Radio Holland Cable Comms X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Maritime communications integrator supporting cableship operations.
Radio Medical Advice X60. Marine Salvage and Wreck Removal: Consultation with shore based medical authorities during salvage operations.
Radio Medical Danmark (Esbjerg) X36. Shipboard Medical, Telemedicine and Seafarer Health: Danish TMAS service for ships under Danish flag and others.
Radio Medical Sankt-Petersburg X36. Shipboard Medical, Telemedicine and Seafarer Health: Russian TMAS service for Russian-flag ships.
Radio Medical UK X36. Shipboard Medical, Telemedicine and Seafarer Health: UK TMAS service formerly operated through NHS Cornwall, now part of integrated maritime medical service.
Radio Officer F3. Seafaring Life, Education, Professions and Institutions: Historic STCW radio operator role superseded by GMDSS operators.
Radio Regulations X16. Nautical Science, Navigation and COLREGs: ITU instrument governing radio use, including maritime bands.
Radio Survey X5. Marine Surveying and Inspection: GMDSS equipment survey under SOLAS Chapter IV.
Radioactive Material X75. IMDG Code, Classes, Packing and Segregation: Substance with activity concentration and total activity above values in IMDG 2.7.2.2.
Radioactive Material Excepted Package Articles Manufactured from Natural Uranium X75. IMDG Code, Classes, Packing and Segregation: UN 2909, Class 7 excepted.
Radioactive Material Excepted Package Empty Packaging X75. IMDG Code, Classes, Packing and Segregation: UN 2908, Class 7 excepted.
Radioactive Material Excepted Package Instruments or Articles X75. IMDG Code, Classes, Packing and Segregation: UN 2911, Class 7 excepted.
Radioactive Material Excepted Package Limited Quantity of Material X75. IMDG Code, Classes, Packing and Segregation: UN 2910, Class 7 excepted.
Radioactive Material Fissile NOS X75. IMDG Code, Classes, Packing and Segregation: UN 2918, Class 7.
Radioactive Material Low Specific Activity LSA-I X75. IMDG Code, Classes, Packing and Segregation: UN 2912, Class 7.
Radioactive Material Low Specific Activity LSA-II X75. IMDG Code, Classes, Packing and Segregation: UN 3321, Class 7.
Radioactive Material Low Specific Activity LSA-III X75. IMDG Code, Classes, Packing and Segregation: UN 3322, Class 7.
Radioactive Material Special Form NOS X75. IMDG Code, Classes, Packing and Segregation: UN 2974, Class 7.
Radioactive Material Surface Contaminated Objects SCO-I X75. IMDG Code, Classes, Packing and Segregation: UN 2913 (also covers SCO-II), Class 7.
Radioactive Material Type A Package X75. IMDG Code, Classes, Packing and Segregation: UN 2915, 3327 fissile excepted, or 3332 special form, Class 7 by content.
Radioactive Material Type B(M) Package X75. IMDG Code, Classes, Packing and Segregation: UN 2917, Class 7.
Radioactive Material Type B(U) Package X75. IMDG Code, Classes, Packing and Segregation: UN 2916, Class 7.
Radioactive Material Type C Package X75. IMDG Code, Classes, Packing and Segregation: UN 3323, Class 7.
Radioactive Substances X28. Ship Recycling and End-of-Life: Materials listed in IHM Table A, mostly in legacy density and level gauges.
Radiographic testing X58. Shipbuilding Yards and Construction: NDT method using X-rays or gamma rays to inspect weld integrity.
Radiographic Testing (RT) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: NDT method using X-rays.
Radiolaria X10. Marine Biology, Fisheries and Oceanography: Single-celled marine protists with silica skeletons.
Radionuclide X75. IMDG Code, Classes, Packing and Segregation: Atom with unstable nucleus, basis for activity classification under IMDG 2.7.
RADius X14. Offshore Oil and Gas Marine Operations: Kongsberg microwave DP reference.
Radome X68. Maritime Satcom and Telecommunications: Protective enclosure around a maritime antenna that shields it from weather while allowing signal passage.
Rae Strait X133. Polar Research Vessels and Polar Code Regimes: Northwest Passage southern route segment traversed by N.B. Palmer.
RaetsMarine X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: Rotterdam-based fixed-premium P&I MGA, now MS Amlin Marine.
Rafael X11. Naval Vessels, Warship Systems and Naval Architecture: Israeli weapons firm, naval products include Typhoon mount and Barak family.
Rafaela S, The [2005] UKHL 11 X143. Landmark Maritime Law Cases and Doctrines: House of Lords held that a straight bill of lading was a bill of lading within the Hague-Visby Rules.
Rafina X85. Ferries, Ro-Pax Operators and Routes: Greek Attic port east of Athens hosting Cyclades fast craft services.
Rafted ice X27. Polar Code, Ice Navigation and Polar Operations: Ice in which one floe overrides another.
Ragnar Locker X25. Maritime Cybersecurity, OT and IT: Ransomware group linked to the September 2020 CMA CGM attack.
RAhuza X30. Tug Operations and Harbour Towage: Robert Allan small-tug design.
RAIB X12. Maritime Casualties and Investigation: Rail Accident Investigation Branch of the UK, a sister body to MAIB under the Department for Transport.
Rail bill of lading C3. Logistics, freight forwarding and multimodal trade: Carriage document for rail under CIM or domestic.
Rail Convoy Project X104. Project Cargo Forwarders and Heavy Transport: Coordinated set of rail wagons moving long or heavy project units together.
Rail Gauge (STS) X94. Port Machinery and Quay Equipment Makers: Center-to-center distance between waterside and landside crane rails, typically 30 to 35 meters on modern STS cranes.
Rail mounted gantry X15. Ports, Terminals and Stevedoring: see RMG.
Rail ramp X6. Container, Intermodal and Trade Codes: Intermodal terminal where containers are loaded onto rail wagons.
Rail Wagon Heavy Duty X104. Project Cargo Forwarders and Heavy Transport: Wagon designed with extra axles and reinforced deck for project cargo.
Rail-Mounted Gantry (RMG) X94. Port Machinery and Quay Equipment Makers: Container yard crane running on fixed rails over a stacking block, manned or automated.
Rain Fade X68. Maritime Satcom and Telecommunications: Signal attenuation caused by rain in the satellite path, especially significant at Ku and Ka bands.
Rain Rate D1. Physical and chemical oceanography and marine meteorology: Precipitation intensity, often measured at sea by disdrometers or satellites.
Rainbow X39. Pre-1900 Maritime History: New York-built clipper of 1845 by John Willis Griffiths, often cited as the first true extreme clipper.
Rainbow Service Berth X113. Drydock and Ship Repair Yards: Reference yard berth at large Asian repair yards designated for outfitting and final dressing after drydocking.
Rainbow trout X10. Marine Biology, Fisheries and Oceanography: *Oncorhynchus mykiss*; anadromous form is steelhead.
Rainbow Trout (Oncorhynchus mykiss) X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: Salmonid farmed extensively in Chile, Iran, Turkey, Peru, Norway and Finland.
Rainbowing X124. Dredging Industry and Reclamation Contractors: Discharge of slurry as a high-velocity jet from TSHD bow, used to build reclamation profile and as marketing icon.
Rainfall (over ocean) X10. Marine Biology, Fisheries and Oceanography: Major component of the surface freshwater budget.
Rainfall Closure (Salmon Fishery) X87. Fishing Vessels and Fisheries Management: Spawning related closure triggered by river flow conditions in some salmon management plans.
Rainfall Hold X104. Project Cargo Forwarders and Heavy Transport: Operational pause on heavy lifts triggered by exceeding rainfall and visibility limits.
Rainmaker X123. Offshore Wind Installation Vessels and Operators: Vestas V236-15.0 prototype unit installed at Osterild test center 2022, world's most powerful operating turbine in 2024.
Rainmaker Index X161. Shipbroking, Freight Derivatives, and Baltic Indices: Generic broker term for a chartering benchmark adopted by a single house, distinguished from the Baltic Exchange indices.
Rainmaker Maritime Academy X160. Maritime Academies, Universities, and STCW Certification: Hypothetical placeholder; see RIMAS, etc., excluded to maintain factual integrity.
Rainwater Drainage Plan, Yard X50. Ship Recycling, Demolition and Hong Kong Convention: The yard drawing showing stormwater management and contamination prevention.
Rajiv Gandhi Maritime Academy X121. Maritime Education, Academies and Universities: Indian DGS-approved MTI.
Rake X3. Ship Handling, Seamanship and Deck Vocabulary: Inclination of a mast or stem.
Rake angle X15. Ports, Terminals and Stevedoring: incline of stacker boom in dry bulk terminals.
Rake Barge X103. US Inland Waterway Towing and Barge: A barge with a raked end at one or both ends, used as a lead or tail barge in a tow.
Rake End X103. US Inland Waterway Towing and Barge: The angled bow or stern of a hopper or tank barge.
RAL (Robert Allan Ltd) X137. Harbour Tugs, Towage Operators and Tug Builders: Vancouver naval architecture firm founded 1930, the world's leading tug design house.
Raleigh, Walter X39. Pre-1900 Maritime History: Elizabethan courtier whose 1595 voyage up the Orinoco sought El Dorado.
RAM X62. Naval Warships and Combat Systems: Rolling Airframe Missile, a short-range surface-to-air missile produced by Raytheon and RAMSYS.
Ram BOP X14. Offshore Oil and Gas Marine Operations: BOP cavity with closing rams (blind, shear, pipe, variable).
RAM Mount Pipeline X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Subsea jumper installation method using guideposts on adjacent structures.
RAM Spreaders X76. Stevedoring, Lashing and Cargo Securing: Container spreader manufacturer headquartered in Hong Kong, supplying ship-to-shore and yard cranes worldwide.
Ram-Type Steering Gear X63. Marine Auxiliary Machinery and Pumps: Hydraulic steering gear with two or four rams acting on a tiller arm.
Raman Amplifier X91. Submarines and Submarine Cable Systems: Distributed optical amplifier technology used selectively on submarine cable systems.
Rambiz X167. Major Salvage Companies, Wreck Removals, and Equipment: Twin hulled sheerleg crane operated by SCALDIS Salvage and Marine Contractors with 3,300 tonne lift capacity.
Rammers X39. Pre-1900 Maritime History: Tools used to seat charges in muzzle-loading naval guns.
Ramming X27. Polar Code, Ice Navigation and Polar Operations: Icebreaking technique of running the bow up on the ice to break it under the ship's weight.
Ramp X15. Ports, Terminals and Stevedoring: ro-ro vessel ramp engaging linkspan or shore ramp.
Ramp angle X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The slope of a RoRo stern, side, or bow ramp, restricted to about 11 to 14 degrees for safe trailer transit.
Ramp Crossing X104. Project Cargo Forwarders and Heavy Transport: Junction between two ramps or barge and quay requiring smooth wheel transition.
Ramp meter (icebreaker) X27. Polar Code, Ice Navigation and Polar Operations: Reference angle of the bow stem for breaking ice by bending.
RAmpage X79. Tugs and Towage Industry: Robert Allan Ltd tug design for compact harbor and terminal operations.
RAmpage 5000 X137. Harbour Tugs, Towage Operators and Tug Builders: 50 m RAmpage tug with up to about 130 t BP.
RAmparts X79. Tugs and Towage Industry: Robert Allan Ltd series of ASD harbor tugs widely built in shipyards worldwide.
RAmparts 2200 X30. Tug Operations and Harbour Towage: 22 m Robert Allan ASD ship-handling tug class.
RAmparts 2400 X30. Tug Operations and Harbour Towage: 24 m Robert Allan ASD ship-handling tug class.
RAmparts 2500 X137. Harbour Tugs, Towage Operators and Tug Builders: 25 m RAmparts variant with circa 70 t BP.
RAmparts 3000 X30. Tug Operations and Harbour Towage: 30 m Robert Allan ASD ship-handling tug class.
RAmparts 3200 X137. Harbour Tugs, Towage Operators and Tug Builders: 32 m RAmparts ASD with about 80 t BP.
RAmparts 3400 X137. Harbour Tugs, Towage Operators and Tug Builders: 34 m RAmparts ASD with about 85 to 95 t BP, widely built in Turkey and India.
Rampion X42. Offshore Wind Installation and Cable Lay: UK offshore wind farm off Sussex operated by RWE.
Rampion Offshore Wind Farm X105. Offshore Wind Farm Installation and Vessels: 400 MW UK offshore wind farm off the Sussex coast commissioned in 2018.
Ramsar Convention D3. Marine environmental science, pollution and conservation: International treaty for the conservation of wetlands of international importance.
Ramsbottom carbon residue X47. Marine Fuel Quality and ISO 8217: Carbon residue method per ASTM D524, alternative to Conradson.
Rance estuary X57. Ocean Energy Beyond Wind: Estuary in Brittany, France, dammed by the La Rance Tidal Power Station.
Rancidity Check X120. Marine Catering, Provisions and Ship Chandlers: HACCP-aligned sensory check on fats and oils before service, recorded in cook's log.
Rancimat X61. Marine Lubricants and Cylinder Oils: Oxidation stability test apparatus used for selected biodegradable lubricants.
Random decrement technique B1. Naval Architecture: Method for extracting damping from random vibration.
Range X3. Ship Handling, Seamanship and Deck Vocabulary: Distance to an object; tidal vertical difference; pull cable out on deck before letting go anchor.
Range (Galley) X120. Marine Catering, Provisions and Ship Chandlers: IMPA 174401 series, electric or LPG cooking range, four to six burners typical.
Range (Geographic) X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Maximum distance at which a light can be seen given Earth's curvature, observer and light heights.
Range (Luminous) X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Maximum distance a light can be seen given its intensity and meteorological visibility.
Range light B3. Nautical Science: Two fixed lights in line indicating channel.
Range lights X3. Ship Handling, Seamanship and Deck Vocabulary: Pair of fixed lights in line marking a channel.
Range of Stability X9. Cargo Securing, Lashing and Stability Vocabulary: Heel range over which GZ is positive.
Range of tide X16. Nautical Science, Navigation and COLREGs: Vertical difference between consecutive high and low waters.
Range Pattern X80. Maritime Search and Rescue Coordination: Search pattern oriented along the line of sight.
Range Pole D2. Hydrography, tides, waves, bathymetry and marine geology: Survey accessory for shoreline positioning.
Range setting X19. Engine Room Watchkeeping and UMS Operations: Calibration of transmitter zero and span for the ECMS.
Range tide X57. Ocean Energy Beyond Wind: Component of the tide associated with vertical sea level change, exploited by tidal range schemes.
Range to Range Voyage X44. Shipping Indices, FFAs and Freight Markets: Route definition using geographical ranges rather than specific ports, common in Baltic time charter route specifications.
Range, nominal X16. Nautical Science, Navigation and COLREGs: Maximum range of a light in 10 nm meteorological visibility.
Ranger X39. Pre-1900 Maritime History: Continental Navy sloop commanded by John Paul Jones in the 1778 cruise that took HMS Drake.
Ranger 2 X65. ROVs, AUVs, USVs and Marine Robotics: Sonardyne USBL product family for offshore survey and dynamic positioning reference.
Ranger USV X109. Maritime Autonomous Surface Ships and MASS Code: A vessel of the United States Navy Overlord program demonstrating long endurance autonomy.
Rankine source method B1. Naval Architecture: Free-surface panel method using Rankine sources.
RANS X54. Naval Architecture Software and IACS Rules: Reynolds-Averaged Navier-Stokes equations underlying ship CFD solvers such as STAR-CCM+ and Fluent.
Ransom Drop X22. Piracy, Maritime Security and Armed Protection: Physical delivery of ransom funds, historically by aerial drop to Somali held tankers.
Ransomware E1. Maritime security, geopolitics and risk: Malware encrypting systems and demanding payment; major shipping cyber threat.
Ransomware-as-a-Service (RaaS) X139. Maritime Cybersecurity, OT Threats and Standards: Affiliate model used by LockBit and Black Basta against shipping targets.
RAO (Response Amplitude Operator) B1. Naval Architecture: Linear transfer function of motion to wave amplitude.
Rao Trim Optimization X54. Naval Architecture Software and IACS Rules: Trim optimization workflow leveraging RAO and resistance curves for fuel efficiency.
Rapeseed (Canola) X1. Cargo Science, Commodities and Cargo Care: Oilseed cargo; Group B with self-heating risk.
Rapeseed Meal X1. Cargo Science, Commodities and Cargo Care: Self-heating; oily.
Rapeseed Oil X93. IBC Code and Chemical Tanker Operations: Vegetable oil pressed from Brassica napus seeds, carried in bulk as a Category Y cargo under Annex II.
Rapid7 X107. Maritime Cybersecurity and OT Security: Vendor of InsightVM vulnerability management and InsightIDR detection and response products.
RaPL (ramp-up power limitation) B2. Marine Engineering: Software-based EPL implementation.
RApport X30. Tug Operations and Harbour Towage: Robert Allan ASD tug design.
Rapson slide X19. Engine Room Watchkeeping and UMS Operations: Crosshead arrangement converting hydraulic ram travel into rudder rotation in ram type steering gear.
Raptive X149. Marine Fuels, Bunkering, and Alternative Fuels: Used in maritime publishing rather than fuel; included only to avoid confusion with maritime acronyms (excluded from this glossary).
Rara Avis X128. Sail Training Ships and Tall Ship Associations: French heritage three masted schooner built 1957, 32 m length, sail training participant in STI Class B.
RAS X10. Marine Biology, Fisheries and Oceanography: Recirculating Aquaculture System, land-based closed-loop fish farming.
RAS (Recirculating Aquaculture System) D4. Fisheries, aquaculture, blue economy and marine resources: Closed system reusing treated water.
Ras Al Khair X124. Dredging Industry and Reclamation Contractors: Saudi port reclamation by Boskalis and NMDC.
Ras Laffan Shipyard X113. Drydock and Ship Repair Yards: N-KOM and Nakilat Damen Shipyards Qatar facility at Ras Laffan serving LNG carriers and offshore vessels.
Ras Tanura X124. Dredging Industry and Reclamation Contractors: Saudi Aramco port maintenance scope.