San Pedro And The Yo-257

San Pedro and the YO-257 is a twin-wreck artificial-reef dive where two sunken ships rest about 70-80 feet apart on a sandy bottom. Divers commonly visit both in one dive, first exploring the large upright YO-257 and then swimming to the smaller San Pedro. The wrecks are largely intact and are notable for attracting green sea turtles, white-tip reef sharks, and schooling reef fish. Access is by boat with operators dropping off roughly 0.6-1.2 miles offshore; divers descend a mooring line and boats tie to mooring buoys on the wrecks. Depths range about 50-100 ft, with the YO-257 resting near 100 ft and its main deck around 75-85 ft, and San Pedro’s deck near 50-60 ft. Visibility is commonly 80-100 ft and water temperature about 75-80°F. Currents associated with Diamond Head can occur but are generally milder at the wrecks; advanced or deep-diving certification is recommended, and divers should use the mooring line, monitor bottom time, perform safety stops, and take care around sharp or rusted metal and reef life. The YO-257 is a former US Navy yard oiler about 175 ft long that was intentionally sunk in 1989 and rests upright at roughly 100 ft with large cut access holes and swimthroughs. The San Pedro is a smaller, roughly 125 ft decommissioned hospital or supply ship sunk in 1996 and lies in shallower water with a more collapsed structure, so penetration is not recommended.