A Salty Dog is the third studio album by English band Procol Harum, released in June 1969. Having an ostensibly nautical theme, as indicated by its cover (a pastiche of the famous Player's Navy Cut cigarette pack), interspersed with straight rock, blues and pop items A Salty Dog showed a slight change of direction from its predecessors, being thematically less obscure. The title track itself was the first Procol track to use an orchestra, as would be referred to in the live album performance some three years later. The musical tensions between the group and Robin Trower were beginning to show in this album, and although his guitar sound remains integral to most of the tracks, Crucifiction Lane (featuring a rare Trower vocal), in retrospect, shows that Trower was already moving in a different direction from the rest of the band. Still this album is much more musically varied than the two previous albums, with 3 Fisher vocals and 1 by Trower. The title track, backed with "Long Gone Geek", reached number 44 in the UK singles chart in 1969 and the album itself number 27 in the album chart. When Gary Brooker first played "A Salty Dog" at the piano for B.J. Wilson, a sunbeam illumined Wilson's face and he told Brooker he thought it was the most beautiful song he had ever heard.
The album was the first record produced by Matthew Fisher, who quit the band soon after its release. This was also the last Procol Harum album to feature bass guitarist Dave Knights.
The song "A Salty Dog" was featured in the 1983 film Purple Haze.