Ask anyone in Pattaya where to take their first proper wreck dive and you will hear the same three letters: HTMS. The HTMS Khram is the wreck that turned this stretch of the Gulf of Thailand into what we call the Gateway to Shipwreck — and it is very likely the first big steel you will ever swim through.
What the Khram actually is
The Khram is a former US Navy landing ship, later transferred to the Royal Thai Navy and scuttled deliberately as an artificial reef. Two decades under water have done what the ocean always does: what was grey steel is now a low ridge of coral, sponge and hydroid, patrolled by batfish and the occasional very relaxed grouper.
Why it is the perfect first wreck
Three reasons we start almost every wreck diver here:
- It sits upright. Orientation is intuitive — the deck is the deck and the bow is the bow. Disorientation is what makes new wreck divers uncomfortable, and the Khram removes most of it.
- The depth is forgiving. You can have a genuinely good dive on this wreck without pushing into decompression, which leaves your attention free for the skills that matter.
- The openings are honest. Large cargo spaces with clear light from above let you experience an overhead environment without committing to a real penetration.
What we teach on it
Our Wreck Specialty runs on the Khram: reel and line work, mapping, safe exterior survey and limited penetration. Divers heading further take Tek-Lite Wreck and then Technical Wreck, where staging and decompression enter the picture.
Planning your dive
The Khram is part of our regular Pattaya wreck rotation — check the schedule for which days we run it. A certified two-dive day is 3,300 THB; see the full price list for courses and packages.
Bring a torch even in good visibility. The best moments on this wreck happen when you put light into a shadow and something looks back.
Conditions and what to expect topside
The run out to the Khram is short by Thai standards, which is part of why it works so well for training. You are not spending three hours on a boat before your first wreck descent; you gear up, get a proper briefing, and go. Sea state in the Gulf is generally gentler than the Andaman, and the surface interval between the two dives is spent within sight of the islands rather than in open ocean.
Visibility on the Khram is honest rather than spectacular. On a good day you will see the whole width of the deck; on an average day you will see enough to work comfortably with a line and a light. This is, we would argue, exactly the right environment to learn in. Wreck skills learned in twenty metres of gin-clear water do not transfer well to the conditions most wreck divers actually face. Skills learned here do.
Water temperature stays comfortable enough year-round that a 3mm suit covers most divers, though anyone doing repetitive deep days or long deco hangs will thank themselves for a 5mm. Thermal comfort matters more than people admit on wreck dives — being cold degrades your judgement long before it degrades your dexterity.
The marine life on the wreck
Artificial reefs do something reefs cannot: they create vertical structure in the middle of open sand. That structure concentrates life. On the Khram you will regularly find schooling batfish hanging in the current shadow of the superstructure, large grouper holding station in the cargo openings, and lionfish tucked into the overhangs where the light does not reach.
Look closer and the wreck gets more interesting. The steel is furred with soft coral and hydroids, and the whole surface is a working macro site — nudibranchs, shrimp, blennies peering out of every bolt hole. Divers who arrive expecting a big-animal experience often leave saying the best thing they saw was fifteen millimetres long.
Turtles pass through. So, occasionally, do larger visitors. We make no promises about either, because a dive centre that promises megafauna is a dive centre that will disappoint you.
Skills that make the difference
Three things separate divers who enjoy the Khram from divers who merely survive it.
Buoyancy first. Everything else is downstream of it. A diver who is fighting their trim inside a cargo hold has no attention left for line, gas or team. We spend real time on buoyancy before anyone goes near an opening, and we are unapologetic about it.
Propulsion technique. A flutter kick inside a wreck destroys the visibility for everyone behind you within seconds, and the silt on the Khram is fine and slow to settle. Frog kick, modified frog and back kick are not stylistic preferences here — they are how the second diver in the team gets to see anything at all.
Gas discipline. Overhead environments punish vague gas planning. We teach the rule of thirds properly, we teach it early, and we expect it to be applied on every dive, including the ones where it feels unnecessary. Habits formed on easy dives are the habits you will have on hard ones.
Where the Khram leads
Most divers meet the Khram once and come back for it. It is a genuinely good dive on its own terms, not merely a training platform. But it is also a gateway in the literal sense: nearly every technical wreck diver we have certified in Pattaya took their first line reel out on this hull.
From here the path runs to the HTMS Khood, deeper and more demanding, and then out to Samaesan and the Hardeep — the wreck that has a genuine claim to being the finest in the Gulf of Thailand. Divers who want the full progression usually work through Wreck Specialty, then Tek-Lite, then Technical Wreck, adding Nitrox and decompression training along the way.
There is no rush. The wrecks are not going anywhere, and the divers who take their time on the Khram are consistently the ones who are comfortable when the overhead gets serious.
Booking a dive on the Khram
We run the Pattaya wreck rotation regularly through the week. If you are certified and simply want to dive it, join a standard two-dive day. If you want to learn to dive wrecks properly, the Wreck Specialty is the place to start and the Khram is where you will do it.
Message us with your dates and your certification level and we will tell you honestly whether the Khram is the right dive for you on the days you are here — and if it is not, we will tell you that too.
A short history worth knowing
Knowing what you are swimming over changes the dive. The Khram began life as a US Navy tank landing ship — a vessel built to run itself deliberately aground so armour and men could pour out of the bow doors onto a beach. Ships of this class were designed to be functional rather than elegant: flat-bottomed, slab-sided, wide open inside.
That design is precisely why she makes such a good wreck. Those vast internal spaces, built to swallow vehicles, are now high-ceilinged rooms full of filtered blue light. The bow doors that once opened onto invasion beaches now frame the silhouettes of divers coming through them. Few wrecks give you interior volume this generous with this little risk.
After her US service she was transferred to the Royal Thai Navy, and at the end of her working life she was cleaned, stripped of hazards and sunk on purpose as an artificial reef. That last detail matters: a deliberately scuttled wreck is prepared for divers in a way that a casualty of storm or war never is. Hatches are secured, hazards removed, entanglement cleared.
She has been down long enough now that the ocean has entirely claimed her. There is a specific pleasure in putting a hand near — never on — a railing and realising that the shape under the coral is a piece of naval engineering that crossed an ocean under its own power. The Gulf turned a warship into a garden, and we get to swim through the result.