Large ship horns have long been used in film, television and travel footage to signal departures, arrivals and the sheer size of ocean liners, and the sound has carried over naturally to short-form video and soundboards. Creators reuse it as a shorthand for travel, luxury holidays and big moments, because listeners recognise it instantly even without seeing a ship. Its low, sustained blast also works as a comedic exaggeration, turning an ordinary entrance into something that feels like a cruise liner docking.