Shipwreck Rapids is a river rapids ride currently operating at SeaWorld San Diego in San Diego, California. This attraction is located in the Shipwreck Island area of the park, which is themed as a South Pacific island where many ships and their crews have been marooned. The four stranded ships are the Implausible, RMS Royal Star, Wholly Mackerel, and Dream Boat II. The other main part of the area is a restaurant named the Shipwreck Reef Cafe. Every so often a ship's horn can be heard, followed by a SOS signal in Morse code.