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Romanian corvette Contraamiral Roman
The Contraamiral August Roman (pennant 261) is a light corvette of the Romanian Naval Forces, a former Turkish HISAR-class patrol vessel bought secondhand and commissioned in 2026.
Romeo-class submarine
The Romeo-class submarine, designated Project 633, was a Soviet diesel-electric torpedo attack submarine of the 1950s; the USSR built only about 20 before switching to nuclear boats.
Ropucha-class landing ship
The Ropucha class (Project 775) is a class of 28 large tank landing ships built in Gdańsk, Poland, for the Soviet Navy from 1974 and operated mainly by Russia.
Royal Caribbean Group
Royal Caribbean Group, formerly Royal Caribbean Cruises Ltd until 2020, is a Miami-based cruise holding company that owns Royal Caribbean International, Celebrity Cruises, and Silversea Cruises, and is the world's second largest cruise company.
Royal Institution of Naval Architects
The Royal Institution of Naval Architects (RINA) is a British professional engineering institution and charity for naval architects and maritime engineers, founded in London in 1860.
Royal Life Saving Society
The Royal Life Saving Society (RLSS) is a Commonwealth-wide drowning-prevention organization founded in London in 1891 by champion swimmer William Henry, best known for the Bronze Medallion.
Royal Mail Ship
Royal Mail Ship, sometimes Royal Mail Steamer and abbreviated RMS, is the prefix for ships carrying mail under contract to the British Royal Mail since 1840.
Royal National Lifeboat Institution
The Royal National Lifeboat Institution (RNLI) is a volunteer charity providing a 24-hour lifeboat rescue service around the coasts of the United Kingdom and Ireland since its founding in 1824.
Royal yacht
A royal yacht is a ship placed at the disposal of a monarch or royal family for official visits and state receptions, the type's best-known example being Britain's HMY Britannia.
RRS Discovery (1962)
RRS Discovery was a British Royal Research Ship, the third of four of the name, built in Aberdeen in 1962 for the National Institute of Oceanography and serving until 2012.
RRS James Cook
RRS James Cook is a British multidisciplinary oceanographic research vessel built in Norway in 2006, owned by NERC, and operated by the National Oceanography Centre in Southampton since 2007.
Ruby Princess
The Ruby Princess is a Crown-class cruise ship operated by Princess Cruises, built by Fincantieri in Italy and entering service in 2008 for up to 3,080 guests.
Russian aircraft carrier Admiral Kuznetsov
The Admiral Kuznetsov is the sole aircraft carrier of the Russian Navy, the largest warship built in a Soviet shipyard, first used in combat off Syria in 2016, and out of service since 2017.
Russian battlecruiser Pyotr Velikiy (Пётр Великий)
Pyotr Velikiy (Пётр Великий), laid down as Yuriy Andropov, is the last of four Russian nuclear-powered Kirov-class heavy missile cruisers and flagship of the Northern Fleet since 1998 or 1999.
Russian battleship Potemkin
The Russian battleship Potemkin, formally Knyaz Potyomkin Tavricheskiy, was a battleship of the Imperial Russian Black Sea Fleet known for its crew's mutiny in June 1905.
Russian cruiser Aurora
Aurora (Аврора), or Cruiser Aurora, is a protected cruiser of the Imperial Russian Navy preserved as a museum ship in Saint Petersburg, famed for her role in the 1917 October Revolution.
Russian cruiser Moskva
The Russian cruiser Moskva, a Slava class guided missile cruiser, served as the Black Sea Fleet flagship until it was sunk by Ukrainian missiles in April 2022.
Russian frigate Admiral Makarov
Admiral Makarov (Адмирал Макаров) is a Project 11356R guided-missile frigate of the Russian Black Sea Fleet, commissioned in 2017, known for Kalibr cruise missiles and repeated Ukrainian attacks on her.
Russian Maritime Register of Shipping
The Russian Maritime Register of Shipping, also known as RMRS, is Russia's national classification society under the Ministry of Transport, founded in 1913, which surveys ships and assigns class notations.
Russian submarine Kursk
The Russian submarine Kursk (Курск, K-141) was a nuclear-powered cruise-missile submarine that sank in the Barents Sea on 12 August 2000 during a fleet exercise, killing all 118 aboard.
Russo-Turkish ironclad Livadia
Livadia (Ливадия) was an imperial steam yacht built on the Clyde in Glasgow in 1880 for Tsar Alexander II, designed by Admiral Popov with a broad turbot-shaped hull for stability.
RV Belgica (research vessel)
RV Belgica is Belgium's oceanographic research vessel, delivered in 2021 to replace the 1984 ship of the same name; it studies the North Sea and sails as a Belgian Navy auxiliary vessel.
RV Knorr
RV Knorr was an American Navy-owned research vessel operated by Woods Hole Oceanographic Institution from 1970 to 2014, covering nearly 1.4 million miles of ocean science.
RV Maria S. Merian
RV Maria S. Merian is a German ocean research vessel based in Rostock, serving marine research since 2006 and able to break ice up to 60 centimeters thick.
RV Sonne
RV Sonne, German for "Sun," is a German deep-sea research vessel commissioned in 2014 and operated on the Pacific and Indian Oceans as Germany's primary platform for marine and Earth science in the Indo-Pacific.
RV Vityaz
RV Vityaz (Витязь, "Knight") was a Soviet oceanographic research ship of the USSR Academy of Sciences from 1949 to 1979, now the main exhibit of the Museum of the World Ocean in Kaliningrad.
S.A. Agulhas II
S.A. Agulhas II is a South African icebreaking vessel for polar supply and scientific research, launched in Finland in 2011 to support Antarctic and sub-Antarctic stations.
Sagar Mala project
The Sagar Mala project, or Sagarmala, is India's flagship port-led development program of the Ministry of Ports, Shipping and Waterways, launched in 2015 to reduce logistics costs.
Sail
A sail is a fabric or rigid surface arranged to catch wind and propel a vessel, the dominant means of marine propulsion until steam and diesel engines displaced it.
Sailboat
A sailboat, or sailing boat, is a watercraft propelled by sails, ranging from small dinghies to ocean-going tall ships, used for commerce, cruising, and racing.