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.

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.

Tanner Bank is an offshore seamount located 56 kilometres from the coast of the United States. This advanced dive site features a complex topography of reef and pinnacle structures rising to a minimum depth of 22 metres, with the surrounding seafloor reaching 32 metres. The environment is characterised by strong, unpredictable currents and significant surge, requiring drift diving experience. Visibility is consistently high at 30 metres. Divers must access the site by boat and should remain vigilant regarding boat traffic during surface intervals. Due to upwelling and water temperatures ranging from 14 to 17 degrees Celsius, thermal protection such as a drysuit or thick wetsuit is recommended.