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.

Turtle Canyon is a reef site located 4000 metres off the coast of Oahu. Accessible only by boat, the site features an average depth of 10 metres, with a range between 5 and 15 metres. Divers and snorkellers can expect visibility between 15 and 30 metres. Conditions are subject to moderate currents and occasional surf. The site is suitable for beginners, with typical dive times lasting 45 minutes. Water temperatures remain consistent throughout the year, ranging from 24C to 26C. Hazards at this location include boat traffic, sea urchins, sharks, sharp coral, and strong currents. Facilities available nearby include boat charters, guided tours, air fills, equipment rental, parking, toilets, and showers.

Magic Island is a shore-entry dive site on Oahu featuring a combination of natural reef and artificial reef structures. The site is suitable for beginners, with depths ranging from 1 to 10 metres and an average depth of 5 metres. Divers should be aware of variable visibility between 2 and 10 metres and mild currents. Hazards at this location include boat traffic, jellyfish, rip currents, and sharp coral. Typical dives last approximately 45 minutes. Facilities available at the site include parking and showers for convenience.

Hanauma Bay is a volcanic crater bay on Oahu providing shore-based access to a diverse reef system. Depths range from 1 metre in the shallows to 21 metres at the outer reef, with an average depth of 9 metres. Visibility typically spans 12 to 24 metres, though surge can affect clarity. Divers and snorkellers must navigate a shore break and be prepared for moderate currents and potential rip currents. The site is suitable for intermediate skill levels, with advanced certification recommended for deeper sections. On-site facilities include parking, toilets, showers, and equipment rental. Arrive early as access is capped and the car park fills quickly.

Aquarium in Oahu offers a varied underwater landscape featuring a combination of natural reef, artificial reef, and cave structures. Suitable for beginner divers, the site provides depths ranging from 7 to 20 metres, with an average depth of 14 metres. Divers can access the area via both shore and boat entries. Conditions are generally mild, with visibility typically spanning 10 to 30 metres and water temperatures remaining consistent between 24 and 26 degrees Celsius. A typical dive at this location lasts approximately 40 minutes. Divers should remain aware of potential hazards, including jellyfish, sharp coral, and stonefish.

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.

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.

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.