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.

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.

Kakaako Point features a combination of natural and artificial reef structures located 350 metres from shore. Divers can explore depths ranging from 7 to 18 metres, with an average depth of 10 metres. Visibility at the site typically spans 10 to 30 metres. The area is accessible by both shore and boat, making it suitable for beginner divers. Water temperatures remain between 23 and 26 degrees Celsius. Divers should be aware of moderate currents, potential surge, and surf during entry. Hazards include heavy boat traffic, rip currents, sea urchins, and sharp coral. Facilities available at the location include parking, toilets, a dive shop, and boat charter services.

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.

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.

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.

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.

Nautilus Reef is a marine reef site located 500 metres off the coast of Oahu. This boat-accessible dive features depths ranging from 9 to 24 metres, with an average depth of 16 metres. Divers should be prepared for moderate currents and potential surge. The site is suitable for intermediate divers, with typical dives lasting around 30 minutes. Visibility varies between 10 and 30 metres. Hazards include sea urchins, sharks, strong currents, and surge. Species recorded around this area include Giant Frogfish, Yellow-edged Moray, Whitetip Reef Shark, White-spotted Octopus, Potter's Angelfish, Undulated Moray, Leaf Scorpionfish, Zebra Moray, Turkey Moray, Snowflake Moray, Day Octopus, Pustular Phyllidia, Thornback Cowfish, and Lagoon Triggerfish.