Most Hawaiian islands lead with reefs. Oahu leads with steel. Off the south shore, within a short boat ride of the Waikiki high-rises, lies one of the densest collections of wreck dives in the Pacific — sunken ships placed as artificial reefs, and one genuine relic of World War II. For wreck divers and history buffs, it's the best reason to gear up on Oahu.
What makes it work is convenience layered on top of drama. The boats leave Kewalo Basin and reach the sites in about fifteen minutes, with Diamond Head and the Honolulu skyline at your back. The wrecks span a range of depths and difficulty, so there's something for newer certified divers and seasoned wreck hounds alike. This guide walks through each ship — its story, depth, difficulty, and what lives there now — plus how to dive them well. For the wider picture, pair it with our Oahu dive shops and Oahu dive sites guides.
- Main launch
- Kewalo Basin
- Boat ride
- ~15 min
- Depth range
- ~80–120+ ft
- Flagship wreck
- Sea Tiger
- Only natural wreck
- The Corsair
- Best season
- Year-round (S. shore)
A Quick Note on "Artificial Reefs"
Here's the twist most first-timers don't expect: nearly all of Oahu's wrecks were sunk on purpose. Through the late 1980s and 1990s, Atlantis Submarines and others deliberately scuttled retired vessels off the south shore to build artificial reefs — partly to enrich the submarine tourist routes, partly to create habitat and dive sites. It worked spectacularly. Within years, the bare hulls became living reefs draped in coral and crowded with fish, turtles, and rays. The one exception is the Corsair, which got to the bottom the hard way.
The Sea Tiger — Oahu's Flagship Wreck
If you dive one Oahu wreck, make it the Sea Tiger. Originally a Chinese trading vessel, it was intentionally sunk in 1999 by a submarine company to expand the reef system off Waikiki. Because the sinking is relatively recent, the ship is remarkably intact — and at roughly 150 feet long, it's substantial. The deck sits around 80 feet, with the hull resting on sand closer to 120, giving divers a generous multi-level profile.
The Sea Tiger rewards exploration. It has multiple swim-throughs and penetration points (some more advanced than others), and it has filled with life: green sea turtles, eagle rays, whitetip reef sharks resting on the sand at the perimeter, moray eels in the crevices, and schooling reef fish swirling over the deck. It's often called Hawaii's deepest popular recreational wreck, and it suits everyone from comfortable open-water divers to advanced wreck enthusiasts.
On deeper Honolulu wrecks, watch the sand at the perimeter for whitetip reef sharks resting just outside the structure — you'll spot their tails first.
The YO-257 & San Pedro — A Two-for-One
About a hundred feet apart, these two wrecks are almost always dived together on a single tank. The YO-257 is the star: a 175-foot US Navy Yard Oiler built in Puget Sound in the 1940s that refueled battleship groups across the Pacific, serving through World War II, Korea, and Vietnam. Atlantis Submarines sank it in 1989, and it now sits upright on the sand around 85 to 100 feet, with its deck and superstructure shallower near 70 to 90. Swim-throughs are abundant, and if you time it right you may see the Atlantis tourist submarine glide past — tourists waving at you through the portholes.
Its smaller neighbor, the San Pedro, was a Korean-owned longline fishing vessel that caught fire and was scuttled by Atlantis in 1996. It's deteriorating faster than the YO-257, so it's less of a swim-through dive now — but its deck has become a turtle cleaning station, and whitetip reef sharks frequently shelter in and around it. Currents around Diamond Head can run strong here, so a guide and good buoyancy matter.
The Corsair — Oahu's Only Natural Wreck
The Corsair is the island's most poignant dive. It's a WWII-era F4U Corsair fighter — the gull-winged Vought aircraft famous in the Pacific theater. On February 22, 1946, this one was on a training flight when engine failure forced the pilot to ditch into the ocean. The pilot was rescued; the plane sank and has rested on the bottom ever since, the only wreck on Oahu that wasn't placed there on purpose.
It lies deep — around 100 to 115 feet, about three miles off the coast near Hawaii Kai — which makes it a dive-only, advanced site with short bottom time and no upper structure to extend the profile. But for those who go, it's special: one wing exposed, the other half-buried in sand, with eagle rays cruising past and octopus and nudibranchs tucked into the wreckage. It's a favorite of underwater photographers and history junkies alike.
Oahu Wreck Depths at a Glance
Depth largely determines difficulty here. This is roughly where each wreck sits, deck to bottom.
Oahu Wreck Dive Depths
Approximate maximum depth in feet · deeper = more advancedDepths are approximate maximums; decks and multi-level options sit shallower. See sources.
| Wreck | Type | Sunk | Depth | Level |
|---|---|---|---|---|
| Sea Tiger | Trading vessel (~150 ft) | 1999 | ~80–120 ft | Novice–Advanced |
| YO-257 | Navy oiler (175 ft) | 1989 | ~85–100 ft | Novice–Advanced |
| San Pedro | Fishing vessel | 1996 | ~80–90 ft | Intermediate |
| Corsair | WWII F4U fighter | 1946 (ditched) | ~100–115 ft | Advanced |
How to Dive Oahu's Wrecks Well
Wreck diving is its own discipline, and Oahu's sites deserve respect. A few essentials:
- Match the wreck to your training. The Sea Tiger's deck and the YO-257 work for many open-water divers with a guide; the Corsair and any penetration past 100 feet call for advanced or wreck certifications.
- Mind the currents. Around Diamond Head they can run strong. Surface-swim to the mooring line promptly and descend along it.
- Don't penetrate untrained. Swim-throughs are tempting but overhead environments need proper training, a light, and a guide who knows the wreck.
- Choose small ratios. A tight diver-to-guide ratio (around 6:1 or better) keeps deeper wreck dives safe.
- Watch your gas and time. Deeper wrecks mean shorter bottom times and faster air use — plan conservatively.
Most operators run these as two-tank trips, pairing a deeper wreck with a shallower reef. Boats leave Kewalo Basin about 10 to 15 minutes from Waikiki. Our Oahu dive shops guide lists trusted operators that run the full wreck lineup.
What You'll See Down There
Oahu's wrecks are living reefs now. Expect green sea turtles (the YO-257/San Pedro pair is a reliable turtle magnet), whitetip reef sharks resting on the sand, spotted eagle rays cruising the perimeter, moray eels and octopus in the structure, and dense schools of reef fish. For more on the animals you'll encounter, see our Hawaii marine life guide. And if you want to keep diving after dark, several of these operators also run the reef night dives covered in our night diving guide.
The Verdict
Oahu's wreck diving is rare in how much it packs into a short boat ride: a flagship ship, a WWII oiler with its own submarine cameo, a turtle-covered fishing vessel, and a genuine fighter-plane relic from 1946 — all off one stretch of coast. Bring the right certification for the depth you want, dive with a good operator, and you'll come up with stories. Plan the rest of your trip around it with our Oahu diving resource.