Sea Tiger (Wreck) is one of Oʻahu's signature boat dives, an upright cargo ship sunk as an artificial reef off Waikiki. The wreck offers deep, advanced wreck diving with swim-throughs, supervised penetration opportunities, and enough structure to keep experienced divers engaged from the deck down to the sand. It is a classic Honolulu wreck site that rewards controlled buoyancy, good navigation, and comfort with overhead space.