They were powered by a Maudslay horizontal twin-cylinder return connecting-rod engine, and were the last British battleships to be fitted with a hoisting screw.

[1] Triumph was initially commissioned in 1873 for the Channel Fleet, being transferred after a short time to the Mediterranean.

[3] She paid off in 1877 to be prepared for transfer to the Pacific as flagship, replacing HMS Shah after her indecisive action against the Peruvian rebel ship Huascar.

Returning home, she was for a short time in reserve at Devonport, and was then flagship at Queenstown between February 1890 and September 1892.

From 1905 she was tender to Warrior, and in 1910 was moved to Devonport to form part of the stoker training establishment, with the name of Indus IV.