HMS Agamemnon is the sixth Astute-class nuclear-powered fleet submarine of the Royal Navy and is currently under construction.

She will be the sixth vessel of the Royal Navy to bear the name, after the legendary Greek king Agamemnon.

[citation needed] The keel was laid on 18 July 2013 by the Minister for Defence Equipment, Support and Technology, Philip Dunne.

[13] Agamemnon's electric switchboards were powered up, for the first time, 1 October 2020, making the boat go "live".

[17] The submarine will be capable of using Tomahawk Block IV land-attack missiles with a range of 1,000 miles (1,600 kilometres)[18] and Spearfish heavyweight torpedoes.