Cortez's Yacht is a yacht belonging to Colonel Juan Cortez.
The yacht is docked in Ocean Beach, Vice City and acts as Colonel Cortez's home while he stays in Vice City. It is also the center of his criminal operations, which range from cocaine trafficking to governmental espionage. The boat is also the location of Cortez's parties, which are thrown often on the ship's deck and frequently receive several of Vice City's most famous celebrities and most notorious criminals as guests. Such guests have included the likes of Ricardo Diaz, Jezz Torrent and Avery Carrington, among others.
It is from this yacht that Colonel Cortez gives all his missions to Tommy Vercetti over the course of the game. After the Colonel leaves Vice City during the mission All Hands On Deck!, the yacht does not appear again, but strangely, it will remain on the map as a static object or a building.