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Resilient Lady
Resilient Lady is an adults-only cruise ship operated by Virgin Voyages, built by Fincantieri and delivered in 2022 as the third of four Lady Ships.
Resolution-class submarine
The Resolution class was a class of four nuclear-powered ballistic missile submarines built for the Royal Navy, carrying 16 Polaris missiles each from 1968 until the mid-1990s.
Revenge-class battleship
The Revenge class, also called the Royal Sovereign or R class, was a group of five super-dreadnought battleships built for the British Royal Navy and completed in 1916 and 1917.
Richard Phillips (merchant mariner)
Richard Phillips, also known as Captain Richard Phillips, is an American merchant mariner held hostage by Somali pirates off Somalia in 2009 and rescued by Navy SEALs.
Richelieu-class battleship
The Richelieu class was a pair of French fast battleships, Richelieu and Jean Bart, built in the late 1930s with eight 380 mm guns in two forward quadruple turrets.
Righting moment
The righting moment, also called the moment of statical stability, is the torque that returns a heeled ship upright, equal to its displacement multiplied by the righting lever GZ.
Rigid inflatable boat
A rigid inflatable boat (RIB), or rigid-hulled inflatable boat, combines a solid hull with an inflatable collar, giving speed plus buoyancy for rescue, military, and leisure use.
RINA
RINA, formerly Registro Italiano Navale, is a multinational ship classification, inspection, and certification company headquartered in Genoa, Italy. Founded in 1861, it is one of twelve members of the International Association of Classification Societies.
River monitor
A river monitor, also called a riverine monitor, is a shallow-draft, heavily armed and armored warship built for rivers and inland waterways rather than the sea, a type named after the Civil War ironclad USS Monitor.
River-class destroyer
The River-class destroyer is a class of 15 warships being built for the Royal Canadian Navy by Irving Shipbuilding in Halifax, replacing its destroyers and frigates.
River-class patrol vessel
The River class is a class of offshore patrol vessels of the British Royal Navy, entering service in 2003–04 and used for fishery protection, border patrol, and disaster relief.
Riverboat
A riverboat is a vessel designed to carry passengers, freight, or both on rivers and inland waterways, most often evoking the shallow-draft paddlewheel steamboats of the nineteenth century.
RMS Aquitania
RMS Aquitania, known as "The Ship Beautiful," was a British ocean liner of the Cunard Line, launched in 1913. It was the largest in the fleet and served for 36 years.
RMS Caronia
RMS Caronia is the name of two Cunard passenger ships built by John Brown at Clydebank: a 1905 steamship and a 1948 cruise liner known as the "Green Goddess".
RMS Carpathia
RMS Carpathia was a British Cunard Line steamship, launched in 1902, that rescued Titanic survivors in 1912 and was sunk by a German submarine in 1918.
RMS Empress of Britain
RMS Empress of Britain was a 42,000-ton Canadian Pacific ocean liner, the largest Allied liner sunk in the Second World War, lost off Ireland in 1940.
RMS Empress of Ireland
RMS Empress of Ireland was a British ocean liner that sank in the St. Lawrence River on 29 May 1914 after colliding with the Norwegian steamer Storstad, killing 1,012 people.
RMS Empress of Japan (1929)
RMS Empress of Japan, launched in 1929, was a Canadian Pacific ocean liner serving the trans-Pacific route out of Vancouver, later renamed Empress of Scotland in 1942.
RMS Lusitania
RMS Lusitania was a British Cunard Line ocean liner launched in 1906, torpedoed by a German submarine off Ireland in 1915 with the loss of 1,195 lives.
RMS Majestic (1914)
RMS Majestic, also known as SS Bismarck, was a British White Star Line ocean liner completed as a war reparation and the world's largest ship until 1935.
RMS Mauretania (1906)
RMS Mauretania was a British Cunard ocean liner launched in 1906 that held the Blue Riband as the fastest Atlantic liner from 1907 to 1929.
RMS Oceanic
RMS Oceanic was a British transatlantic passenger liner of the White Star Line, launched in Belfast in 1899 and wrecked off Foula, Shetland, in September 1914.
RMS Olympic
RMS Olympic was a British White Star Line ocean liner, lead ship of the Olympic class with the Titanic and Britannic, in service from 1911 to 1935.
RMS Queen Elizabeth
RMS Queen Elizabeth was a British ocean liner launched in 1938 for Cunard's Southampton–New York service, the largest liner of her time, destroyed by fire in Hong Kong in 1972.
RMS Queen Mary
RMS Queen Mary, also known as The Queen Mary, is a retired British ocean liner moored as a hotel in Long Beach, California, since 1967.
RMS Republic (1903)
RMS Republic was a White Star Line passenger liner built in 1903 that sank off Nantucket in 1909 after colliding with the Italian steamer SS Florida.
ROKS Cheonan sinking
The ROKS Cheonan sinking occurred on 26 March 2010, when a South Korean patrol corvette sank near Baengnyeong Island; an investigation blamed a North Korean torpedo, and 46 sailors died.
ROKS Jeongjo the Great
ROKS Jeongjo the Great (정조대왕함, DDG-995) is a South Korean Aegis guided-missile destroyer, the first in the navy with ballistic missile defense capability, commissioned in 2024.
Roll damping
Roll damping is the dissipation of energy opposing a ship's side-to-side rolling motion; roll is the largest and least damped ship motion, so it is central to predicting behavior in waves.
Roll-on/roll-off
Roll-on/roll-off, or ro-ro, is a ship design in which wheeled cargo such as cars and trucks is driven on and off through ramps instead of being lifted by crane.