Nine Fathom Bank is a deep reef and pinnacle site located 160 kilometres off the coast of the United States near LA County. The site features depths ranging from 23 to 35 metres, with an average depth of 28 metres. Due to the significant depth and strong currents, this site is suited for intermediate divers with solid buoyancy control. Visibility varies between 10 and 30 metres, and water temperatures remain cold, ranging from 13 to 17 degrees Celsius. Access is by boat only, and divers must be prepared for deep water, strong currents, and shark activity. A surface marker buoy is essential for all dives.

Bishop Rock is a reef and kelp forest site located off the Pacific Coast in LA County. Accessible only by boat, the site features depths ranging from 14 to 30 metres. Divers can expect visibility between 10 and 20 metres, with water temperatures typically between 14 and 17 degrees Celsius. While mild currents are common, the site is subject to surge and swell, which can increase the difficulty of the dive. Due to these conditions and the presence of kelp, intermediate skill levels are recommended. Divers should monitor local swell and current reports closely before departure, as conditions can change significantly.

Cortez Bank is a submerged pinnacle located 160 kilometres off the coast of California. The site rises from deep water to a minimum depth of 25 metres, with typical dives ranging between 25 and 40 metres. Divers experience strong, unpredictable currents and consistent visibility of 30 metres. Due to the significant depth and remote location, this site is strictly for advanced divers requiring deep and nitrox certifications. Access is by boat only, and surface conditions can be rough. Water temperatures remain between 13 and 16 degrees Celsius, necessitating a drysuit or thick wetsuit. Divers should carry a surface marker buoy and dive knife while monitoring for boat traffic.