Instruct: Given a question, retrieve documents that answer the question.
Query: What is the biggest icebreaker ship in existence?
The "Arktika" class is a Russian (former Soviet) class of nuclear-powered icebreakers. Formerly known as "Project 10520 nuclear-powered icebreaker", they were the largest and most powerful icebreakers until the 2016 launch of the ship named Arktika. Ships of the "Arktika" class are owned by the federal government, but were operated by the Murmansk Shipping Company (MSCO) until 2008, when they were transferred to the fully government-owned operator Atomflot. Of the ten civilian nuclear-powered vessels built by Russia (and the Soviet Union), six have been of this type. They are used for escorting merchant ships in the Arctic Ocean north of Siberia as well as for scientific and recreational expeditions to the Arctic.
The Viking Ship Museum overlooking the inlet of Roskilde Fjord was built in 1969 with the main purpose of exhibiting the five newly discovered Skuldelev ships. In the late 1990s, excavations for the shipyard expansion of the museum uncovered a further 9 ships from the Viking Age and early medieval period. It is the largest discovery of prehistoric ships in Northern Europe and includes the longest Viking warship ever found; the "Roskilde 6" at 36 metres. The excavations are not yet completed.
ISOICO has produced Iran's first ocean liner ship named "Iran-Arak". It was launched in Hormozgan southern city port in 2009. It weighs over 7000 tons and is able to carry more than 30,000 tons of cargo or 2,200 TEU. Iran-Arak can accelerate to 32 knots (59.3 km/h) and is able to sail 25 days non-stop. The vessel, which has cost $50 million to construct, is 185 meters (607 ft) long, 30 meters (98.4 ft) wide, has 10 meters (32.8 ft) of draft and uses more than 16.7 MW to reach 21.5 knots (39.8 km/h).
The Neoplan Jumbocruiser was an articulated double-deck multi-axle city coach built by Neoplan Bus GmbH between 1975 and 1992. At in length, wide and in height, it is in the Guinness World Records as the world's largest bus with a capacity for 170 passengers.
Built in 1856, PS "Skibladner" is the oldest steamship still in operation, serving towns along lake Mjøsa in Norway.
Myklebustskipet is the remains of a burned Viking ship that was found in a burial mound in the farm Myklebust in Nordfjordeid, Norway. Only the nails are intact, but from the number of the nails the ship may have been at least 25 meters long, perhaps the largest Viking ship that has been found in Norway so far. There were found sound stitches, mastering and a lot of shields in the burial mound, which was excavated in 1874 by the archaeologist Anders Lorange.
The Docks brought with them many associated industries, such as flour and sugar processing, and also ship building. On 31 January 1858 the largest ship of that time, the SS "Great Eastern" designed by Isambard Kingdom Brunel, was launched from the yard of Messrs Scott, Russell & Co, of Millwall. The length was too big for the river so the ship had to be launched sideways. Due to the technical difficulties of the launch this was the last big ship to be built on the Island and the industry fell into a decline. However, parts of the launching slipway and plate works have been preserved in situ and may be seen close to Masthouse Terrace Pier.
The Mississippi Queen was the second-largest paddle wheel driven river steamboat ever built, second only to the larger "American Queen". The ship was the largest such steamboat when she was built in 1976 by the Delta Queen Steamboat Company at Jeffboat in Indiana and was a seven-deck recreation of a classic Mississippi riverboat. She was later owned by the Majestic America Line. The "Mississippi Queen" had 206 state rooms for a capacity of 412 guests and a crew of 157. It was 116 meters (382 ft) long, 21 meters (68 ft) wide, and displaces 3,709 metric tonnes (3,364 tons).
The heaviest known cephalopod, and the largest living invertebrate, is the colossal squid. The largest recorded specimen of this species, caught in the Ross Sea in 2007, weighed . However, its beak is not the largest known from this species; even bigger colossal squid beaks have been recovered from the stomachs of sperm whales, indicating that this species can grow larger still.
The museum is most famous for the completely whole Oseberg ship, excavated from the largest known ship burial in the world. Other 
main attractions at the Viking Ship Museum are the Gokstad ship and Tune ship. Additionally, the Viking Age display includes sledges, beds, a horse cart, wood carving, tent components, buckets and other grave goods.
With the conclusion of World War I and the signing of the Washington Naval Treaty, the size of the Imperial Japanese Navy was significantly lessened, with a ratio of 5:5:3 required between the capital ships of the United Kingdom, the United States, and Japan. The treaty also banned Japan from building any new capital ships until 1931, with no capital ship permitted to exceed 35,000 tons. Provided that new additions did not exceed 3,000 tons, existing capital ships were allowed to be upgraded with improved torpedo bulges and deck armor. By the time the Washington Treaty had been fully implemented in Japan, only three classes of World War I-era capital ships—the and battleships, and the "Kongō"-class battlecruisers—remained active.
Steamship generally refers to larger steam-powered ships, usually ocean-going, capable of carrying a (ship's) boat. The engine room, to the right, is a concept drawing during the construction of the ship. The term steam wheeler is archaic and rarely used. In England, "steam packet", after its sailing predecessor, was the usual term; even "steam barge" could be used (Steam tonnage in Lloyd's Register exceeded sailing ships tonnage by 1865). The French transatlantic steamer was probably the last of her type to be equipped with sails, although she never used them. Steamships in turn were overtaken by diesel-driven ships in the second half of the 20th century. Most warships used steam propulsion from the 1860s until the late 20th century
The Gokstad ship is a 9th-century Viking ship found in a burial mound at Gokstad in Sandar, Sandefjord, Vestfold, Norway. It is currently on display at the Viking Ship Museum in Oslo, Norway.
It is the largest preserved Viking ship in Norway.
The SS "Great Eastern" was launched in 1858 and was six times bigger than any ship before. She was the third ship designed by Brunel. The "Great Eastern" had six masts as well as coal fired engines driving paddle wheels. It was designed to carry enough coal to travel to Australia and return, and was intended to carry 4,000 passengers (or 10,000 soldiers). Work started on the ship in 1854 but there were many problems in building and launching the ship. After fitting out at Deptford she undertook trials in September 1859 but the heater attached to the paddle engine boilers exploded. As the ship had been fitted with watertight bulkheads she survived and was repaired. Because of the opening of the Suez Canal, she was not used on the Australian route as envisaged but on the Atlantic crossings. Passengers did not like the rolling in storms and she was sold to a cable laying company after only six years. The "Great Eastern" was used to lay the first transatlantic telegraph cable and many others subsequently. She was broken up in 1888.
The United States Navy is a blue-water navy that is arguably the world's largest and most powerful because, among its numerous other vessels, it has the world's largest fleet of nuclear powered aircraft carriers. The carrier fleet currently comprises the and supercarriers. These carriers serve as the centerpieces and flagships for the Navy's Carrier Strike Groups, with their embarked Carrier Air Wings and accompanying ships and submarines, which strongly contribute to the US ability to project force around the globe. The following is a complete list of all the US Navy's carriers and classes to date, and their status;
Over the course of its 37-year history, the Roach shipyard had many notable achievements to its credit. In 1874 it built "City of Peking" and "City of Tokio", the two largest gross-tonnage ships ever built in the United States to that date and the second largest in the world after the experimental British behemoth . In 1883 it constructed America's first steamer with a steel-plated hull. The yard played a key role in the so-called "Birth of the New Navy" when it built the four "ABCD ships"—the U.S. Navy's first steel ships. It also established a reputation for itself as a builder of lavishly outfitted "night boats" for the Long Island Sound trade, and in its last years, built the first three American ships to be powered by steam turbines. In total, the Delaware River Works built 179 ships between 1871 and 1908, including 10 warships for the U.S. Navy.
A steamship, often referred to as a steamer, is a type of steam powered vessel, typically ocean-faring and seaworthy, that is propelled by one or more steam engines that typically move (turn) propellers or paddlewheels. The first steamships came into practical usage during the early 1800s; however, there were exceptions that came before. Steamships usually use the prefix designations of "PS" for "paddle steamer" or "SS" for "screw steamer" (using a propeller or screw). As paddle steamers became less common, "SS" is assumed by many to stand for "steam ship". Ships powered by internal combustion engines use a prefix such as "MV" for "motor vessel", so it is not correct to use "SS" for most modern vessels.
The fleet remained in captivity during the negotiations that ultimately produced the Treaty of Versailles. Reuter believed that the British intended to seize the German ships on 21 June 1919, which was the deadline for Germany to have signed the peace treaty. Unaware that the deadline had been extended to the 23rd, Reuter ordered the ships to be sunk at the next opportunity. On the morning of 21 June, the British fleet left Scapa Flow to conduct training maneuvers, and at 11:20 Reuter transmitted the order to his ships. "Seydlitz" slipped beneath the surface at 13:50. On her side and on the bottom in twelve fathoms of water the wreck was frequently mistaken for a small island, and was sold in this condition as scrap to the salvage firm of Cox and Danks, led by Ernest Cox, along with a battleship and twenty-six destroyers. The ship was raised on 2 November 1928, and while still inverted was towed south to be scrapped in Rosyth by 1930. "Seydlitz"s bell is on display at the Laboe Naval Memorial.
"Queen Elizabeth 2" also inaugurated "one-class cruising" where all passengers received the same quality berthing and facilities. This revitalized the market as the appeal of luxury cruising began to catch on, on both sides of the Atlantic. The 1970s television series "Love Boat", helped to popularize the concept as a romantic opportunity for couples. Another ship to make this transition was SS "Norway", originally the ocean liner SS "France" and later converted to cruising duties as the Caribbean's first "super-ship".
Contemporary cruise ships built in the late 1980s and later, such as "Sovereign"-class which broke the size record held for decades by "Norway", showed characteristics of size and strength once reserved for ocean liners — some have undertaken regular scheduled transatlantic crossings. The "Sovereign"-class ships were the first "megaships" to be built for the mass cruising market, they also were the first series of cruise ships to include a multi-story atrium with glass elevators. They also had a single deck devoted entirely to cabins with private balconies instead of oceanview cabins. Other cruise lines soon launched ships with similar attributes, such as the "Fantasy"-class, leading up to the Panamax-type "Vista"-class, designed such that two thirds of the oceanview staterooms have verandas. As the veranda suites were particularly lucrative for cruise lines, something which was lacking in older ocean liners, recent cruise ships have been designed to maximize such amenities and have been described as "balcony-laden floating condominiums".
Until 1975-1980, cruises offered shuffleboard, deck chairs, "drinks with umbrellas and little else for a few hundred passengers". After 1980, they offered increasing amenities. As of 2010, city-sized ships have dozens of amenities.
Draken Harald Hårfagre () is a large Viking longship built in the municipality of Haugesund, Norway. "Draken Harald Hårfagre" brings the seafaring qualities of a warship from the old Norse sagas to life. It is a ship that combines ocean-crossing sailing capabilities with a warship's use of oars.
A fast craft is a vessel capable of speeds over 30 knots. HSICs (High Speed Interceptor Craft) however, trump fast craft with speeds of over 50 knots. HSICs are usually either custom or law enforcement craft. Law enforcement use these extremely fast boats to catch criminals such as smugglers or drug traffickers who use fast craft as well. The military have started to use HSICs to stop international threats such as pirates, militias, terrorists and weapons traffickers. Originally HSICs were not meant to carry large weapons. Now that the military is using them, they are being built with heavy machine guns. The boats have to be fitted with robust weight control and at the same time have heavy amour. HSICs must do without propellers to account for cavitation and vibrations. Instead HSICs use surface drivers or water jets.
Since 1989 the nuclear-powered icebreakers have also been used for tourist purposes carrying passengers to the North Pole. Each participant pays up to US$ 25,000 for a cruise lasting three weeks. The NS "Sibir" was used for the first two tourist cruises in 1989 and 1990. In 1991 and 1992, the tourist trips to the North Pole were undertaken by NS "Sovyetski Soyuz". During the summer of 1993 the NS "Yamal" was used for three tourist expeditions in the Arctic. The NS "Yamal" has a separate accommodation section for tourists. The nuclear-powered icebreaker "50 Let Pobedy" (known in English as the "50 Years of Victory") contains an accommodation deck customised for tourists.
After the newest and most powerful state-owned icebreakers, "Voima" and "Jääkarhu", were handed over to Soviet Union as war reparations, Finland was left with four old steam-powered icebreakers and the small diesel-electric "Sisu", which had been rejected due to the extensive damage it had sustained in the war. The newest steam-powered icebreaker, "Tarmo", was almost 40 years old and along with the others long overdue for replacement — even the largest Finnish icebreakers were not wide and powerful enough to assist the biggest post-war cargo ships. There was also a severe shortage of coal and occasionally the Finnish icebreakers had to rely on firewood. The steam-powered icebreakers were completely overhauled for the last time in 1951–1952 when they finally received modern navigation equipment — even as late as 1952 some had neither gyrocompass, sonar nor radar — and their crew spaces were rebuilt to modern standards. There were talks about converting the furnaces of "Sampo" from coal to oil, but it was not deemed necessary as the old icebreaker was due to decommissioning in the near future.
When the Treaty of Tartu was signed on 14 October 1920, Finland agreed to return the Russian icebreakers that the Finnish White Guard had seized during the Civil War in 1918. As a result, the largest and most powerful state-owned icebreaker of Finland at that time, "Wäinämöinen", was handed over to Estonia in 1922. Since both the size of the ships calling at the Finnish winter ports and the amount of exported goods, especially forest products, had increased considerably since the First World War, there was a definite need for a large and powerful icebreaker. One of the key issues was the beam of the existing icebreakers, , which was not enough for the new ships used to transport goods across the Atlantic Ocean.
On 24 May 1956, Wärtsilä and Sudoimport, the Soviet foreign trade organization with a monopoly for the foreign trade of ships, signed a shipbuilding contract for the construction of two polar icebreakers. While only half as powerful as the 44,000hp "Lenin", the new icebreakers featured the most powerful diesel-electric power plant ever installed on a ship at the time. The Soviet negotiators had additional requirements for deep draught and fuel consumption, which Wahlforss promised Wärtsilä to reach. In practice, the demands put the company's engineering expertise to a tough test. At the end, however, Wärtsilä could deliver what Wahlforss had promised. Few years later, Wärtsilä received a follow-up order for three more icebreakers of the same design.