Koh Chang: 1-Day Dive Trip to Top Underwater Sites

Koh Chang’s best underwater day is built around a choice: local sites with the HTMS Chang wreck, or the clear waters and coral gardens of Koh Rang National Marine Park. You get a full day on a spacious boat, with equipment, lunch, drinks, hotel pickup, and an English-speaking guide included.

I like the simple all-in-one setup, especially the west-coast hotel transfer and the small groups limited to four people. I also like that scuba guests, snorkelers, free-divers, and even non-participating boat joiners can share the same day. The main catch is that the destination depends on the day, and the THB 200 national park fee is extra in cash.

Key points to know before booking

• HTMS Chang or Koh Rang: The boat visits local sites, including the shipwreck, or heads to the national marine park depending on conditions and the day’s plan.
• Small groups of up to four: This allows more personal attention during briefings and underwater sessions.
• Everything needed is supplied: Scuba equipment, snorkeling gear, lunch, fruit, water, coffee, tea, soft drinks, and a professional guide are included.
• Good for mixed groups: Scuba guests, free-divers, snorkelers, and boat joiners can spend the day together.
• West-coast hotel pickup included: East-coast hotels need to arrange their own transfer.
• Bring your paperwork: Certified scuba participants should bring certification and a dive log.

Choosing between the HTMS Chang wreck and Koh Rang

The heart of this trip is the day’s destination. You will visit either Koh Chang’s local underwater sites or Koh Rang National Marine Park. That gives the operator room to choose a suitable plan, but it also means you cannot book this outing expecting one fixed route every time.

The local option includes the HTMS Chang wreck, an impressive shipwreck that gives the day a clear sense of adventure. Wreck sites are appealing because they offer more than open reef scenery. You have a large structure to explore, with unusual shapes, surfaces, and passage points to observe from the water. The exact experience depends on your certification, the conditions, and the guide’s plan.

The Koh Rang option focuses on clear water and coral reefs. If you prefer reef scenery, fish viewing, and a more classic tropical underwater setting, this route may be the better fit. It also makes sense for a mixed group, since snorkelers can enjoy the surface views while scuba guests and free-divers explore below.

The important practical point is to ask about the planned site when you book or before departure. The operator may choose between these areas based on the day’s schedule and conditions, so treat the route as flexible rather than guaranteed.

A full day on a spacious boat

This is not a quick shore outing. It is a full-day boat trip, with hotel pickup from the west coast of Koh Chang and time on the water between sessions. The schedule begins with pickup at your hotel reception, though the exact starting time is not fixed in the supplied details. You should check availability for the departure time that suits your plans.

Once aboard, you can settle into a slower rhythm. The boat provides room to rest, sunbathe, eat, and enjoy the ride. That matters because a full day in the water can be tiring, especially for newer scuba participants or anyone combining several activities.

Lunch and fresh fruit are included, along with water, coffee, tea, and soft drinks. You do not need to build the day around finding food or buying drinks at each stop. The simple meal service also helps keep the group together rather than splitting up during the break.

If you are not entering the water, the boat still works as a base for the day. You can join as a boat passenger, relax on deck, and spend time with friends or family who are taking part in the water activities.

What the first underwater session is like

Before you enter the water, the guide gives a full safety briefing. This is especially useful when a group includes people with different levels of experience or different activities planned. You receive instructions for the equipment, the site, and the basic plan before leaving the boat.

All scuba equipment is supplied. Snorkeling equipment is also included, and the trip is set up for free-diving as well. You do not have to rent separate gear for each activity, which keeps the day easier for mixed groups.

The small group limit is one of the strongest features here. With no more than four participants, the guide can keep a closer eye on the group and spend more time answering questions. A smaller group can also make the briefing feel less rushed and help families stay together.

The guide’s role matters most during the actual session. One family specifically praised Ale for being professional and attentive, which is the sort of personal instruction that can make a difference when children or less confident participants are involved. The experience provider, BB Divers, also offers instructors in English, Thai, Cambodian, French, Dutch, Chinese, and German.

The tour is not limited to certified scuba guests. PADI courses in scuba and free-diving are available onboard, making it possible for people with different experience levels to use the same boat. You should confirm the course arrangement when booking if instruction is your main reason for choosing the trip.

HTMS Chang for wreck fans

The HTMS Chang is the most distinctive feature of the local-site option. A shipwreck gives you a different kind of underwater setting from a coral reef. Rather than looking across a broad reef area, you explore a defined object with a strong outline and plenty of visual detail.

Your guide will determine how the wreck fits into the session. Certification and experience matter here, so you should bring your scuba certification and dive log as requested. Those documents help the operator understand your background and plan an appropriate activity.

The wreck may be the better choice if you enjoy maritime sites and want something more memorable than a standard reef visit. It may be less appealing if your main goal is gentle snorkeling in shallow water, though the broader trip can still include suitable activities for snorkelers and free-divers.

I would ask three questions before departure: Is the HTMS Chang planned for this day, what activities are available for non-scuba participants, and how will the group be divided? The listing confirms that all locations suit scuba, free-diving, and snorkeling, but the exact way each site is used can vary.

Koh Rang National Marine Park and the extra fee

Koh Rang National Marine Park offers a different mood. The draw is clear water and coral reefs, making it a natural choice for people who want colorful reef scenery and easy time in the water. The park route is also attractive for families and groups where not everyone wants to use scuba equipment.

The national park entry fee is not part of the advertised price. You need to pay THB 200 per person in cash. This is a small but important cost to include in your budget, particularly if several people are joining.

I would carry the exact amount or enough small notes so payment is quick. The supplied details do not state whether the fee applies on every departure, since the boat may visit local sites instead. Ask which route is planned and bring cash in case Koh Rang is on the schedule.

The park option may suit you best if reef viewing is more important than visiting a wreck. It also gives snorkelers a clear reason to join, since they can enjoy the water without taking a scuba course.

Food, drinks, and time between sessions

The practical details are where this trip earns much of its price. You receive lunch, fresh fruit, water, coffee, tea, and soft drinks, so the day is not just a transfer and a brief water session. You have a complete boat day with meals and a place to rest between activities.

A spacious boat is useful in Thailand’s strong sun. You can find a comfortable place on deck, sunbathe, or simply sit out of the water while the crew prepares the next activity. The larger layout also helps keep scuba guests and snorkelers from feeling as if they are competing for space.

Bring whatever personal sun protection you normally use, though the supplied information does not specify a particular shade arrangement or seating setup. It is sensible to plan for time on deck, as the full-day format includes travel and rest as well as water sessions.

An optional underwater camera rental is available. Your photographs are saved to an SD card for you to take home. This is a useful add-on if you want a record of the wreck or reef without risking your own camera, but it is not included in the $107 price.

Is the $107 price good value?

At $107 per person, this is not the cheapest possible way to spend time in the water around Koh Chang. It is a stronger value when you count what is included: west-coast hotel transfers, a full-day boat trip, lunch, fruit, drinks, scuba equipment, snorkeling equipment, and a professional guide.

The small group limit improves the value further. You are not paying only for transport to a reef. You are also paying for supervision, equipment handling, a safety briefing, and access to either a wreck site or a national park route.

The price is less attractive if you only want a short snorkeling session or if you are staying on Koh Chang’s east coast. East-coast hotel transfers are not included, so you will need to arrange your own way to the departure point. Add the THB 200 cash park fee if the Koh Rang route is planned.

For a certified scuba participant who wants a full day with gear and food already organized, the package is fairly easy to justify. For a non-participant who mainly wants a boat ride, the value depends on how much you enjoy the long day on the water.

Who should book this Koh Chang trip?

This outing is a good match for several kinds of visitors:

• Certified scuba guests who want the chance to visit the HTMS Chang wreck or local reef sites.
• Families who want attentive guidance and activities at different levels.
• Groups combining scuba, snorkeling, free-diving, and relaxed time on the boat.
• Visitors who prefer a full-day package with meals, drinks, gear, and transfers included.
• People staying on Koh Chang’s west coast who want a simple pickup arrangement.

It is less suitable if you need a guaranteed visit to one specific site. The route changes between local sites and Koh Rang, so the flexibility is useful but the exact destination is not fixed.

Pregnant women should not book this activity. Certified scuba participants should bring their certification and dive log. The trip is wheelchair accessible, though you should still confirm the practical boarding arrangements before paying if you have specific mobility needs.

Booking details that matter

You can cancel up to 24 hours before the activity for a full refund. The reserve-now-and-pay-later option also gives you some flexibility if your Koh Chang schedule is still changing.

Hotel pickup is included only from hotels on Koh Chang’s west coast. Pickup is at the hotel reception, so be ready there at the confirmed time. East-coast visitors need to arrange their own transfer.

The activity is listed as a small group with a maximum of four participants. Instructor support is available in English, Thai, Cambodian, French, Dutch, Chinese, and German, which is helpful for international families and groups.

The price is $107 per person, with the Koh Rang national park entry fee extra when that route is used. Check the available departure time and ask about the day’s planned sites before finalizing your booking.

Final call: book it if the flexible route suits you

I would book this trip if you want a full day rather than a short water activity, especially if you value small groups, included equipment, and a meal-and-drinks package. The choice between the HTMS Chang wreck and Koh Rang also gives the day more variety than a fixed reef transfer.

I would pause if one exact site is essential to your plans, if you are staying on the east coast and do not want to arrange transport, or if you only want a brief snorkeling outing. For everyone else, the combination of personal guidance, mixed-activity access, and a complete boat setup makes this one of the more practical ways to explore Koh Chang underwater.

FAQ

What sites does the boat visit?

The boat visits Koh Chang’s local sites, including the HTMS Chang wreck, or Koh Rang National Marine Park. The destination depends on the day.

Is hotel pickup included?

Roundtrip pickup is included from hotels on Koh Chang’s west coast. Transfers from east-coast hotels are not included.

Is lunch included?

Yes. Lunch and fresh fruit are included, along with water, coffee, tea, and soft drinks.

Is equipment provided?

Yes. Scuba equipment and snorkeling equipment are included. The trip also supports free-diving.

Do I need to bring certification?

Certified scuba participants should bring their diving certification and dive log.

Is the national park fee included?

No. Koh Rang National Marine Park entry costs THB 200 per person and must be paid in cash.