Mission Bay Jetty offers a combination of natural reef and artificial reef structures suitable for both diving and snorkelling. The site is accessible via a shore entry and is well-suited for beginners. Divers and snorkellers can expect depths ranging from 6 to 12 metres, with an average depth of 9 metres. Conditions include mild currents and visibility typically around 5 metres. Water temperatures fluctuate between 15C and 21C throughout the year. Night diving is permitted at this location. Hazards to be aware of include boat traffic, potential entanglement, low visibility, and surf. Parking facilities are available for visitors.

Mission Bay Jetty South offers a diverse underwater environment featuring a mix of reef, artificial reef, kelp forest, and seagrass habitats. This shore entry site is suitable for beginners, with depths ranging from 6 to 12 metres and an average depth of 7 metres. Divers typically spend 45 minutes exploring the area. Conditions include mild currents and visibility between 3 and 6 metres. Water temperatures fluctuate throughout the year, ranging from 15C in the winter to 20C in late summer. Hazards to be aware of include boat traffic, potential entanglement, surf, and surge.

Spear Shack is a shore-entry reef and kelp forest site in the United States. Divers can explore depths ranging from 3 to 21 metres, with an average depth of 12 metres, making it suitable for beginners. Visibility varies between 3 and 10 metres. Marine life recorded at the site includes California sea lions, lesser two-spot octopus, Garibaldi, and various nudibranchs such as Hermissenda, clown dorids, and sorcerer's dorids. Divers may also encounter California spiny lobsters, sea hares, sea stars, and rock crabs. Shore entry requires careful navigation of the surf break. Divers should remain vigilant regarding boat traffic and the risk of kelp entanglement.

Nosc Tower Wreck is an artificial reef located 1609 metres offshore in the United States. This site is suitable for intermediate divers and requires boat access. The wreck lies at depths ranging from 9 to 18 metres, with an average depth of 14 metres. Divers should expect mild currents and visibility between 5 and 8 metres. Water temperatures fluctuate between 15C and 19C, with a thermocline present that can cause temperatures to drop by 5 to 10 degrees Fahrenheit at depth. Hazards at this location include boat traffic, potential entanglement, sharp structures, and surge. Typical dives at this site last approximately 45 minutes.

Mission Point Park is a shore-entry dive site featuring a combination of natural reef and artificial reef structures. The site is suitable for beginners, with depths ranging from 1 to 9 metres and an average depth of 2 metres. Divers should be aware of moderate currents, surf, and boat traffic in the area. Visibility typically fluctuates between 3 and 7 metres. Water temperatures range from 15C to 21C, though upwelling can cause temperatures to drop significantly, sometimes falling below 13C. Facilities available at the park include parking, toilets, and showers. Night diving is permitted at this location, with typical dives lasting approximately 55 minutes.

The Ruby E is a decommissioned US Coast Guard cutter resting on a sandy bottom off San Diego. This artificial reef sits at depths between 15 and 26 metres, with an average depth of 23 metres. Divers access the site by boat, approximately 3218 metres from shore. Conditions feature mild currents and visibility ranging from 5 to 18 metres. The wreck offers penetration opportunities, though these require advanced buoyancy control and awareness of entanglement risks. Due to the overhead environment and depth, this site is suited for intermediate divers. Water temperatures remain cold, ranging from 14C to 19C, necessitating a drysuit or a 7mm wetsuit with a hooded vest.

The Ingraham Street Bridge is a purpose-sunk artificial reef located on the Pacific Coast of the United States. The structure sits at depths between 18 and 21 metres, with an average depth of 19 metres. Access is by boat only. Divers should be prepared for moderate currents and variable visibility ranging from 5 to 25 metres. Due to the nature of the wreck, entanglement risks exist, and careful buoyancy control is required. Water temperatures fluctuate between 14 and 20 degrees Celsius, necessitating appropriate thermal protection. Night diving is permitted for those familiar with the site. Typical dive times are approximately 40 minutes.

The Yukon Wreck is an artificial reef located 3218 metres offshore from San Diego. This wreck dive sits at depths between 18 and 34 metres, with an average depth of 24 metres. Access is strictly by boat charter. Divers should be prepared for cold water temperatures, which typically range from 10 to 19 degrees Celsius throughout the year. Visibility varies significantly from 3 to 18 metres. Due to the depth, potential for entanglement, overhead environments within the wreck, and variable currents, this site is suitable only for advanced divers. Divers should be aware of hazards including cold water, surge, and low visibility.