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.

The YO-257 and San Pedro are two artificial reef wrecks located 70 feet apart off the coast of Oahu. The YO-257 is a 175-foot former navy oiler sunk in 1989, while the 125-foot San Pedro, a former hospital ship, was sunk in 1996. This drift dive site reaches depths between 18 and 36 metres, with an average depth of 25 metres. Due to strong currents, deep water, and overhead environments, this site is suitable for advanced divers only. Access is by boat, and divers should remain aware of boat traffic. Species recorded around this area include giant frogfish, whitetip reef sharks, and various moray eels.

Point Panic Beach Park in Oahu is a shore-entry reef site located approximately 350 metres from the coast. Divers typically experience depths ranging from 5 to 18 metres, with an average depth of 10 metres. The site is suited for intermediate divers due to variable conditions, including moderate currents, surge, and surf. Visibility generally fluctuates between 10 and 30 metres. Hazards at this location include boat traffic, sharp coral, and potential for low visibility. Facilities available at the park include parking, toilets, and showers. A typical dive at this location lasts around 45 minutes.

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.

YO-257 is an artificial reef wreck located 1609 metres off the coast of Oahu. This advanced dive site features a wreck structure resting at depths ranging from 24 to 115 metres, with an average depth of 27 metres. Access is by boat only, and divers should be prepared for strong currents and variable visibility between 15 and 100 metres. The site presents hazards including entanglement risks, overhead environments, and boat traffic. Water temperatures remain consistent between 24 and 25 degrees Celsius throughout the year. Due to the depth and environmental conditions, this site is strictly for advanced divers.

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.

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.