The Sea Tiger is a 50-metre-long vessel sunk in 1999 as an artificial reef off Oahu. Resting upright on the seabed at depths between 18 and 37 metres, the wreck offers penetration opportunities for advanced divers, including cargo refrigeration holds, hallways, and the engine room. Divers regularly encounter wrasses, T-bar swallowtail, and various moray eels, including turkey, yellow-edged, snowflake, and undulated species. Other sightings include giant frogfish, leaf scorpionfish, whitetip reef sharks, and day octopuses. Due to the depth, overhead environment, and potential for moderate currents, this site is strictly for advanced divers. Boat access is required, and the site is also suitable for night diving.

Horseshoe Reef is a combined natural and artificial reef located 402 metres offshore in Oahu. The site features a depth range of 6 to 30 metres, with an average depth of 12 metres, making it suitable for beginners. Access is by boat only, and the site is situated near the Kewalo Channel marker buoy. Divers can expect mild currents and visibility ranging from 6 to 30 metres. The site is suitable for night diving, with typical dives lasting around 40 minutes. Facilities including air fills, equipment rental, and guided tours are available nearby. Divers should be aware of boat traffic and sharp coral in the area.

Nautilus Reef is an offshore reef located 800 metres from the coast of Oahu. This site is suitable for intermediate divers and snorkellers, with depths ranging from 5 to 30 metres and an average depth of 10 metres. Access is by boat only. Divers can encounter a variety of marine life, including common sightings of Yellow-edged Moray, Turkey Moray, and Imperial Nudibranch. Less frequently, visitors may spot Giant Frogfish, Whitetip Reef Shark, and Day Octopus. The site features moderate currents and surge, with visibility typically between 14 and 30 metres. Hazards include sea urchins, strong currents, and surge. Night diving is permitted at this location.

Deep D is an artificial reef located 2400 metres off the coast of Oahu. This site features a consistent depth of 15 metres, making it suitable for beginner divers. Access is by boat only. Divers can expect mild currents and visibility ranging between 20 and 30 metres. The water temperature remains stable throughout the year, typically between 25 and 27 degrees Celsius. Night diving is permitted at this location. Divers should be aware of sharp coral present in the area. A typical dive at this site lasts approximately 45 minutes.

Nautilus Reef is a site composed of an ancient lava field located 300 metres offshore from Oahu. This reef features a shallow northwest section that slopes to a maximum depth of 30 metres, with an average depth of 12 metres. Divers can access the site via boat or shore. Conditions include visibility ranging from 10 to 30 metres, though divers should be aware of strong currents and surge. The site is suitable for beginners and supports night diving. Facilities available at the location include parking, toilets, showers, changing rooms, boat charters, and guided tours. Typical dives at this location last approximately 30 minutes.

New Reef is a shallow marine site located 100 metres off the coast of Oahu. This reef is suitable for beginners, featuring a consistent depth of approximately 6 metres. Access to the site is by boat only. Water temperatures at this location fluctuate between 24C and 27C throughout the year. As a shallow reef environment, it offers a straightforward dive experience for those looking to explore the local underwater topography.

Kewalo Pipe is an artificial reef site located 400 metres off the coast of Oahu. The site features a large pipe extending from the shoreline, which is covered in coral growth. Divers typically explore the structure at depths ranging from 9 to 20 metres, with an average depth of 15 metres. Access to the site requires a boat. Conditions are generally mild, though divers should be aware of potential hazards including boat traffic, surge, and strong currents. The site is suitable for beginners and supports night diving, with typical dives lasting around 45 minutes. Visibility at the site varies significantly, ranging from 5 to 35 metres.

Point Panic in Oahu is a reef and artificial reef site suitable for intermediate divers and snorkellers. The site features depths ranging from 6 to 18 metres, with an average depth of 7 metres. Access is via a shore entry. Divers and snorkellers should be aware of variable conditions, including moderate currents, surge, surf, and potential rip currents. Visibility typically fluctuates between 10 and 30 metres. The area experiences boat traffic, and users should exercise caution regarding sharp coral. Facilities at the location include parking, toilets, and showers. Night diving is permitted, with typical dives lasting approximately 45 minutes.