TSS Duke of Argyll was a railway steamer passenger ship that operated in Europe from 1956 to 1975.

Out of all three built, it was the longest serving ship and most modified of its type.

[1] She was a replacement for the 1928 steamer built by the London Midland and Scottish Railway, RMS Duke of Argyll.

Built at Harland & Wolff, Belfast, launched on 12 January 1956 and making its maiden voyage on 27 September 1956, the vessel was designed to operate as both a passenger ferry (primarily on the Heysham to Belfast route) and as a cruise ship.

She arrived in Hong Kong as Faith Power in 1994 and was renamed Fairy Princess in 1995 and then Zenith.