M/S Viking Grace is a Viking Line cruise ferry that entered service in 2013 on the route between Turku, Åland and Stockholm. Like many large passenger ships, it marks sailings with a short departure tune passengers hear in the terminal and on deck as the vessel leaves port. Travellers began recording and sharing that cue from Baltic crossings, turning a routine onboard announcement sound into a recognisable clip for ferry fans. It now appears in trip reports, ship spotting videos and nostalgic posts about cruising in northern Europe.