Turtle Canyons is a reef and artificial reef site located off the coast of Oahu. Divers typically experience depths ranging from 5 to 15 metres, with an average depth of 10 metres. Access to the site is by boat, as it is situated approximately 4023 metres from the shore. Conditions are generally mild, though visibility can fluctuate between 7 and 50 metres. The site is suitable for beginners, with typical dives lasting around 30 minutes. Hazards to be aware of include boat traffic, sea urchins, sharks, and surf. Water temperatures remain consistent throughout the year, ranging between 25 and 26 degrees Celsius.

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.

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.

The Sea Tiger Wreck is an artificial reef located 5000 metres off the coast of Oahu. This wreck dive sits at depths ranging from 24 to 37 metres, with an average depth of 30 metres. Access is strictly by boat. Due to the depth, potential for entanglement, overhead environments, and moderate currents, this site is suitable only for advanced divers. Visibility typically ranges between 15 and 30 metres, and water temperatures fluctuate between 22C and 25C throughout the year. Divers should be aware of hazards including the deep profile and sharp structures associated with the wreck.

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.

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.

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.