Ship horns have long been used at sea to signal departures, arrivals and warnings in fog, with larger vessels producing the deepest tones. Online, recordings of those blasts moved from sound libraries to meme soundboards, where Spanish-speaking users search for them as sonido de bocina de barco. The clip became popular in short edits, including sailor and football goal posts, because a real maritime signal sounds absurdly grand when placed over everyday footage. That mix of authenticity and exaggeration keeps it in regular use.