Six ships of the Royal Navy have been named HMS Indefatigable:
HMS Indefatigable (1784) was a 64-gun third-rate ship of the line launched in 1784, razeed to a 44-gun frigate in 1795 and broken up in 1816. This was the ship popularised by C. S. Forester in the early volumes of his Hornblower series of novels.HMS Indefatigable was to have been a 50-gun fourth rate. She was ordered in 1832 but cancelled in 1834.HMS Indefatigable (1848) was a 50-gun fourth rate launched in 1848, loaned as a training ship after 1865 (see TS Indefatigable,) and sold in 1914.HMS Indefatigable (1891) was an Apollo-class second class cruiser launched in 1891, renamed HMS Melpomene in 1910, and sold in 1913.HMS Indefatigable (1909) was an Indefatigable-class battlecruiser, launched in 1909 and sunk at the Battle of Jutland in 1916.HMS Indefatigable (R10) was an Implacable-class aircraft carrier, launched in 1942 and scrapped in 1956.