| Fork. | Forklaring |
| R | Rock, Rød, Resistance (modstand), Q.T.G. radiostation |
| r | retvisende |
| R Lt | Obstruction light |
| R Lts | Obstruction light |
| r&cc | Riots and civil commotion |
| r&l | Rail & lake |
| r&o | Rail & Ocean |
| r. | rød |
| r.s.v.p. | Re`pondez, sìl vous plait (please reply) |
| r/p | Retun of post ( for orders) |
| r/t | Round trip, or Radio telephone, or Rye terms. |
| r/v | Round voyage |
| R2N | Réparation Navale Nazairienne, Saint Nazaire Frankrig. |
| ra | Receivers approval |
| Ra | Radar station |
| RAB | Royal Artic Bygdeservice, lokal kystfart på Grønland |
| RAC | Royal Artic Containeroperations |
| RACON | Sammenskrivning af : RADAR og BEACON, radarsvarerfyr/ID |
| Racon | Radiobeacon (radiosvarefyr) |
| Radar | Radio Detecting And Ranging. Påvisning og afstandsmåling ved hjælp af radiobølger. |
| radar | RAdio Detection And Ranging |
| RAH | Royal Artic Havneservice |
| RAL | Royal Artic Line, ex. Den Kongelige Grønlandske Handel, KNI. Ejes af Grønlands hjemmestyre med 50 % og J.Lauritzen med 50 %, i 1995 trak J.Lauritzen sig ud af ejerskabet. |
| RAL | Royal Artic Linieagentur |
| RAL | Rostock Atlantik Line GmbH |
| RAS | Radio Advisory Service |
| RAST | Rotterdam Shortsea Terminal |
| RAT | Royal Artic Tankers, etableret 1997 med 50% til Grønlands hjemmestyre og med 50% til Herning Shipping. |
| RB | Ringbolt |
| rc | Refrigerated Container |
| RC | Radio beacon (radiofyr) |
| RC | Republic of Cuba (gl. nationsbogstav) |
| rc&l | Rail, canal and lake |
| RCC | Rescue Coordination Center, luftfartens redningscentral, ledet af Flyvertaktisk kommando i Karup. |
| RCC | Regional Pirate Center, Kuala Lumpur, Malaysia. Udarbejder daglige rapporter/ advarsler om piratvirksomhed. Underlagt IMO, se også IMB |
| RCC | (Air) Rescue Coordination Center |
| rcc&s | Riots, civil commotion and strikes |
| RCCL | Royal Caribbean Cruises Line |
| RCHM | Robotic Container Handling Machine, hurtigtarbejdende losse/lasteudstyr for containere. Opfundet i USA 1997 |
| RCM | Refrigeration Control and Monitoring |
| RCM | Reliability Centered Maintenance |
| RCM | Risk Crisis Management |
| RCOM | Reliability Centered Operation and Maintenance, vedligeholdelsesprogram for Wärtsilä maskiner. |
| RCRM | Rig Ressource Management Courses |
| RCS | Radar Cross Section, måling af radarreflektores virkning/effekt. |
| RCS | Remote Control System |
| RCVR | Receivers |
| rd | Road, Running days |
| RD | Direction radiobeacon |
| rdc | Running down clause |
| RDF | Radio Direction Finder, lig radiopejling, RDF betegnelse for radaren blev brugt under 2.verdenskrig. |
| RDF | Radio Direction Finder (radiopejler) |
| re | Relating to, or With reference to |
| rec or rcvd | Received |
| RECHTO CUP | årligt sportsstævne for shippingskredse, arrangeret af Rechnitzer og Thomsen, ålborg, heraf navnet: Rechto cup |
| Refcon | Kølecontainer-overvågning via elektroniske følere |
| refg | Refrige-rating/rated/ - ration |
| REMBRANDT | REal time Manoevring BeRthing AND Training simulator, PC-windows 95 baseret manøvresimulator, udgivet af BMT SeaTech. British Marine Technology |
| RENC | Regional Electronic Navigation Chart Center |
| Rep | Reported |
| RET | Retired after finishing |
| rett. | rettelse |
| RG | Radio direction finding station |
| rg or rge | Range |
| RHE | Radar Target Enhancer, forstærker af indkomne radarsignaler |
| RI | Registro Italiano |
| RI | Lang bøjelig stang, som skibsbyggere bruger til afmærkning og til kurvemål |
| RI | Republic of Indonesia (gl. nationsbogstav) |
| RIMECO | Riggelsen Metal Company, ejer Peter Riggelsen, åbenrå |
| RINA | Registro Italiano Navigazione, italiensk klasseselskab |
| RINA | The Royal Institution og Naval Architects, svensk |
| rit | Refining in transit |
| RK | Republic of Korea (gl. nationsbogstav) |
| RLF | Redernes LandsForening, norsk |
| RM | Romania (gl. nationsbogstav) |
| RNA | Royal Navy Association, eng. sammenslutning af navy-folk fra 2. verdenskrig |
| RNLB | Royal National Life-Boat Institution. Verdens ældste redningsvæsen, oprettet i 1824 af sir William Hilary |
| rnr | Rate not reported |
| ro | Registred office |
| Ro-Pax | Kombineret Roll on/Roll off - passagerskib |
| Ro/Lo-skib | Et kombineret skib for roll-on/roll-off og Lift-on/Lift-off, et skib der kan transportere såvel rullegods som sværdgods |
| Rob | Remaining on board |
| rob | Remaining on board, især om bunkersbeholdning |
| ROC | Restricted Operator Certificate, begrænset certifikat som radiooperatør, inkl. GMDSS |
| ROLS | Remote Operated Offloading System |
| RORC | Royal Ocean Racing Club |
| RoRo | Roll-on Roll-off anlæg |
| RoRoCCC | Roll On Roll Off Car Container Carrier |
| ROV | Remote Operated Vehicle, fartøj som kan sættes i søen fra moderskibet, via en stor Moonpool midt i skibet, se SØFART 11/96. |
| rp | River Plate, or Return Premium |
| rpm | Revolutions per minute |
| RRIS | Rapid Response Investigation Service, hold med base i Kuala Lumpur, Malaysia, der undersøger piratoverfald. Hører under IMB, se dette. |
| rs | Rupees (currency of India) |
| RS | Russian Register |
| rs&cc | Riots, strike and civil commotions |
| RSC | Rescue Sub-Center |
| RSL | Radial Side Loader |
| RSW | Refrigerated Salt Water, saltvand nedkølet til ca 1grader til nedkøling af fiskefangster i store trawlere. |
| RT | Revenue Tonne (i.e. 1.0 metric tonne or 1.0 cubic meter, wichever gresater). The overall RT is calculated on a line by basis of the Packing list using the largest amount. The overall freight liability is calculated on the total RT amount, multiplied by th |
| RTE | Refrigerated Transport Electronics |
| RU | Rescue Unit |
| Ru | ruiner |
| rv. | retvisende |
| RW | Red White, Rotating loop radiobeacon |
| rx | Receiver (radio) |