A shipwreck you can swim past, plus calm reef water the next stop. That mix is what makes this Ko Chang day trip stand out, especially for people who already have scuba certification and just want a smooth, well-run day. I like that everything is included (including gear, lunch, drinks, and snacks), and I really appreciate the small max group size of 4 travelers, which usually means less waiting and more hands-on attention.

One thing to keep in mind: the HTMS Chang wreck is a real wreck, not a kiddie pool. Even though the trip description says it can suit all levels, some parts can run deeper than you might expect, so be honest about your comfort and certification level before you commit.

BBdivers meets you at BB Divers (PADI 5-star Ko Chang center area, 16/2 หมู่ 1 Tambon Koh Chang Tai) for an 8:00 am start, then you’re back at the same meeting point at the end. The overall plan is two underwater sessions plus a lunch break, with pickup and drop-off included.

Key takeaways before you go

• HTMS Chang wreck is the big draw, and the crew structures the day so you still get extra reef time.
• Koh Rang National Park focuses on relaxed, calmer-water reefs and includes multiple stops.
• Small-group max of 4 helps the day feel personal and organized.
• All equipment included means you can travel lighter and spend less time on logistics.
• Buffet lunch + drinks + snacks keep you fueled between water times.
• National park fees not included, so budget for that extra cost.

What this 8-hour two-session underwater trip really includes

This is an 8-hour day outing built around two underwater sessions from Ko Chang. You’ll get round-trip convenience with hotel pickup and drop-off, and you don’t have to arrange gear—equipment use is included.

On top of that, the food and drinks are handled for you. You’ll have a buffet lunch plus free drinks and free snacks during the day. For many people, that’s the best part of a full-day marine trip: you spend less time figuring out where to eat, and more time thinking about what to see next.

The one extra cost to note is simple: national park fees are not included. If you’re trying to budget, assume you’ll pay a park-related fee on the day.

Meeting at BBdivers: smoother than the usual scramble

The start point is BB Divers in Koh Chang Tai (16/2 หมู่ 1 Tambon Koh Chang Tai, Amphoe Ko Chang, Trat 23170). Start time is 8:00 am, and the trip ends back at the meeting point.

In practice, what you want from a day like this is clarity. This operator keeps the day organized, and the small size matters. With a maximum of 4 travelers, you’re less likely to be shuffled around while the boat crew does logistics for a big crowd.

The crew also runs a tight rhythm around the water time and the breaks. You’ll be told what you need, you’ll get set up with the right gear, and then you’ll move on to the first underwater location.

If you’re returning after time away from scuba, ask for a quick refresher. In past trips with the company, guides (including Steve) have helped people get back up to speed so the day feels comfortable instead of rushed.

Session at HTMS Chang: the towering wreck and real underwater structure

The first underwater option is the HTMS Chang shipwreck. This is described as the largest shipwreck in Thailand, and it’s the kind of site that naturally creates a wow moment the moment you see the scale of it underwater.

What makes the wreck visit especially good for a day trip: you’re not only doing wreck time. The plan includes the main wreck experience plus two additional reef dives (so you’re not spending the whole morning just staring at steel). That helps if you love wrecks but also want healthy coral and fish life during the same day.

Depth note to stay smart: wrecks can change how the day feels depending on where you are in the structure. One guide (Max) was mentioned for an HTMS Chang outing that ran around 18 meters, with a recommendation that people have an advanced open water level for that particular profile. Translation: even if the tour is marketed as suitable for many certified levels, the practical reality is that the wreck can push you deeper than you expect. If you’re hovering at the edge of your comfort zone, tell your guide early and match the plan to your certification and breathing pace.

Koh Rang National Park: calm reefs and multiple water stops

The second option is Koh Rang National Park, a protected marine reserve with around 40 untouched islands. The big appeal here is the vibe: the description calls out calm waters and shallow reefs, which usually means a more relaxed feel compared with open-water conditions.

This part of the trip is set up with multiple scuba and snorkeling stops. That matters because it gives you more chances to spot marine life and to adjust your day based on how you feel underwater. It’s also a good fit if you want reef color and fish activity without worrying as much about strong currents.

What you can hope to see:

• tropical reef fish and coral gardens
• smaller critters like nudibranchs (the kind of slow, detailed life you spot when you move carefully)
• and, if conditions line up, the trip notes mention whale sharks as a possible sighting

Quick reality check: you’re not guaranteed specific wildlife. But the site style is consistent with frequent sightings, and the structure of multiple stops increases your chances of having at least one memorable moment.

Gear, guides, and the certification rule (with names you’ll recognize)

This experience is designed specifically for certified scuba participants, and you do need to provide evidence of certification when joining. The operator is clear about it, and that’s a good thing. It keeps the day safer and helps the guides plan depth and timing the way they’re supposed to.

Two things I like about the way the day is staffed:

• you’ll have a professional guide through the day
• and the crew is attentive about making sure equipment is working well and that you understand the plan

From the reviews and what the company’s approach seems to emphasize, guide names that come up include Oscar (boatmaster), Steve (also seen helping with refreshers), Mr Cho, Max, and Chang for private-guided experiences. That variety is a positive sign: it suggests they have a team built for different personalities and scuba comfort levels.

Also, pay attention to how the wreck session is paced. One person had an eye issue during the last portion and couldn’t complete the plan, which is a reminder that underwater comfort is very individual. If you wear contacts, have eye irritation history, or you’re coming off a cold, tell the staff early. It’s easier to solve problems before you drop below the surface.

Food and drinks: buffet lunch that keeps you happy

A full-day marine plan only works if you can eat well in between water sessions. Here, you get a buffet lunch plus free drinks and free snacks. That’s not a minor perk. It affects how you feel during the second session and how quickly you recover.

Also, the day runs about 8 hours, so you’ll want calories and hydration ready to go. This style of included food means you can focus on the sites instead of hunting down a place to eat while your schedule is ticking.

One more practical note: because drinks are included, you’ll still want to pace yourself. If you tend to get sleepy after carbs and sun, take it slow and sip water before and after your underwater time.

Price and value: what $130.39 gets you on Ko Chang

The price is listed at $130.39 per person for the two underwater sessions, and the day is scheduled at about 8 hours. That can sound high or normal depending on what you’re used to paying, so here’s the value math as I see it.

You’re getting:

• equipment included
• professional guidance
• boat logistics to two different marine areas
• hotel pickup and drop-off
• buffet lunch
• snacks and drinks

The one item not included is national park fees. So your all-in cost can be a bit higher once you add that.

Compared with tours that nickel-and-dime for gear, transport, and food, this package looks built for convenience. If you’re traveling light and want fewer moving parts, the included equipment and pickup are the big value levers. And the small max group of 4 helps you feel like the day is built around you, not a large herd.

If you’re already local and have your own gear, the equipment inclusion matters less. But even then, the time savings and the boat crew handling the schedule usually still makes it worth it.

Who should book this Koh Chang day trip (and who should reconsider)

This trip fits best if you:

• are already certified and want two underwater sessions in a single day
• want a wreck experience with HTMS Chang, plus a calmer reef option at Koh Rang National Park
• prefer small-group service and clear planning
• value included meals and drinks so the day feels smooth

You might reconsider or choose the operator carefully if:

• your comfort level with wreck profiles is limited (some HTMS Chang profiles have been described around 18 meters, so advanced comfort can matter)
• you have medical or eye issues that could flare up underwater
• you’re coming in with no recent buoyancy practice and don’t think you’ll handle air and timing changes without extra help

If you’re returning after time away, ask for a refresher before you commit. In at least one experience shared with the operator, Steve helped people get reoriented so they felt confident again. That kind of support is what turns a stressful day into a good one.

Should you book? My quick verdict

Book this if you want two high-impact underwater stops in one organized day, and you like the idea of small-group attention with included gear and a real meal. The HTMS Chang wreck is a standout target, and Koh Rang National Park adds a calmer, shallow-reef style of experience.

I’d skip or slow down your decision if wreck depth makes you uneasy, because even when a tour says it can work for multiple levels, the actual site profile can run deeper than you expect. The good news is that the day is structured, guided, and staff seem prepared to help you get comfortable.

If you can match the wreck to your certification and comfort, this looks like a strong value play for Ko Chang.

FAQ

Do I need my scuba certification for this trip

Yes. Evidence of dive certification is required from all divers participating.

What’s included in the price

The package includes beverages, lunch, light refreshments, drinks, all activities, a professional guide, hotel pickup and drop-off, and use of equipment.

Are national park fees included

No. National park fees are not included.

How many people are on the trip

This activity has a maximum of 4 travelers.

What time does the trip start

The start time is 8:00 am, and the trip ends back at the meeting point.

Can I book additional underwater sessions

Additional dives may be available for an extra fee of 1000 Bht.