• The first Leviathan was a 70-gun third-rate
  Third-rate
  In the British Royal Navy, a third rate was a ship of the line which from the 1720s mounted between 64 and 80 guns, typically built with two gun decks . Years of experience proved that the third rate ships embodied the best compromise between sailing ability , firepower, and cost...
  
   ship of the line
  Ship of the line
  A ship of the line was a type of naval warship constructed from the 17th through the mid-19th century to take part in the naval tactic known as the line of battle, in which two columns of opposing warships would manoeuvre to bring the greatest weight of broadside guns to bear...
  
   launched in 1750 as Northumberland
  HMS Northumberland (1750)
  HMS Northumberland was a 70-gun third rate ship of the line of the Royal Navy, built at Plymouth Dockyard to the draught specified by the 1745 Establishment, and launched on 1 December 1750....
  
  , renamed in 1777 and sunk in 1780 in the Atlantic.
• The second Leviathan
  HMS Leviathan (1790)
  HMS Leviathan was a 74-gun third-rate ship of the line of the Royal Navy, launched on 9 October 1790. At the Battle of Trafalgar under Henry William Bayntun, she was near the front of the windward column led by Admiral Lord Nelson aboard his flagship, , and captured the Spanish ship San Augustin.In...
  
   was a 74-gun
  Seventy-four (ship)
  The "seventy-four" was a type of two-decked sailing ship of the line nominally carrying 74 guns. Originally developed by the French Navy in the mid-18th century, the design proved to be a good balance between firepower and sailing qualities, and was adopted by the British Royal Navy , as well as...
  
   third rate launched in 1790. She fought at the Battle of Trafalgar
  Battle of Trafalgar
  The Battle of Trafalgar was a sea battle fought between the British Royal Navy and the combined fleets of the French Navy and Spanish Navy, during the War of the Third Coalition of the Napoleonic Wars ....
  
  , was used as a convict ship
  Convict ship
  The term convict ship is a colloquial term used to describe any ship engaged on a voyage to carry convicted felons under sentence of penal transportation from their place of conviction to their place of exile.-Colonial practice:...
  
   from 1816 and sold in 1848.
• The third Leviathan
  HMS Leviathan (1901)
  HMS Leviathan was a 14,100-ton Drake-class armoured cruiser of the Royal Navy, and the third ship to bear the name.Like her sisters, Leviathan served in the First World War, surviving it to be sold for breaking up on 3 March 1920 to Hughes Bolckow of Blyth....
  
   was a Drake-class
  Drake class cruiser
  The Drake-class was a four-ship class of armoured cruisers built around 1900 for the Royal Navy.-Design:The class were enlarged versions of the Cressy class.-History:The ships served in the First World War with only two surviving it...
  
   armoured cruiser launched in 1901 and sold for scrap in 1920.
• The fourth Leviathan was a Majestic-class aircraft carrier
  Aircraft carrier
  An aircraft carrier is a warship designed with a primary mission of deploying and recovering aircraft, acting as a seagoing airbase. Aircraft carriers thus allow a naval force to project air power worldwide without having to depend on local bases for staging aircraft operations...
  
  . She was launched in 1943 but never completed and scrapped in 1968.

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