Salty is a dockyard diesel engine from the children's television series Thomas and Friends, known for working at the docks and telling stories of the sea. His horn is one of his most recognisable traits, a cheerful sound that matches his friendly, storytelling personality. As clips from the show spread across video platforms and soundboards, fans began lifting short effects like this one for edits, reaction videos and Thomas-themed compilations. It remains popular because it is instantly recognisable, short enough to drop into a joke, and carries a warm, nautical charm.