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

The main draw here is the choice between Koh Chang’s local underwater sites, including the impressive HTMS Chang wreck, and the clear coral waters of Koh Rang National Marine Park. You spend a full day on a roomy boat, with time in the water and time to stretch out, eat lunch, and enjoy the ride.

I like two things right away: small groups limited to four participants, and the fact that scuba users, snorkelers, and free-divers can share the same boat. The all-in price also covers equipment, lunch, fruit, drinks, a guide, and west-coast hotel pickup. The main catch is that the exact site depends on the day, and Koh Rang adds a THB 200 cash park fee.

Key points

• HTMS Chang wreck: A large former naval ship creates the trip’s most distinctive underwater setting.
• Two possible routes: You’ll visit local sites or Koh Rang National Marine Park, depending on the day.
• Small-group instruction: Groups are limited to four, with briefings and professional supervision.
• One boat for different activities: Scuba, snorkeling, and free-diving are all supported.
• Useful inclusions: Equipment, lunch, fresh fruit, hot drinks, soft drinks, and west-coast transfers are covered.
• Extra cost to plan for: Koh Rang National Marine Park entry costs THB 200 per person in cash.

Two very different underwater days from Koh Chang

This is not a fixed sightseeing cruise with the same stops every day. The boat heads either toward Koh Chang’s local sites or to Koh Rang National Marine Park. That flexibility is useful, but you need to accept that you may not know the exact underwater setting until the day’s plan is confirmed.

The local route brings the chance to visit the HTMS Chang wreck, the most memorable feature listed for this trip. A shipwreck gives you something unusual to look at beyond the usual reef scenery, with the vessel itself shaping the underwater experience. The route can also include coral reefs, so the day is not limited to one attraction.

The Koh Rang route offers clear water and coral sites within the national marine park. This option may suit you if reef scenery matters more than seeing a wreck. It also brings the extra THB 200 park entrance charge, payable in cash, so keep that money ready if this route is selected.

The tour is designed for certified scuba participants, free-divers, and snorkelers. That makes it a practical choice for a mixed group. One person can use a tank, another can snorkel at the surface, and another can practice free-diving, without arranging separate boat trips.

What the full day feels like on the boat

Your pickup is from the reception of a hotel on Koh Chang’s west coast. Transfers from east-coast hotels are not included, so your hotel location matters before you book. The day lasts from the morning departure through the return, with starting times shown when you check availability.

The boat is described as spacious and comfortable, which matters on a full-day outing. You are not in the water every minute. Between sessions, you can sit in the sun, relax on deck, eat, drink, and watch the coast pass by. If you are joining the boat without taking part in scuba or snorkeling, the open deck gives you a reason to come along rather than wait at the hotel.

Lunch and fresh fruit are included. Water, coffee, tea, and soft drinks are also provided, so you do not need to plan for a day without refreshments. These are simple details, but they make a difference when the boat is out for most of the day.

I would treat this as an active day with comfortable breaks, not as a luxury cruise. The boat gives you room to relax, but the main purpose is getting into the water. If you want a quiet sea trip with little activity, the boat-joiner option may work, but scuba and snorkeling participants get the most from the price.

Seeing the HTMS Chang wreck

The HTMS Chang is the trip’s signature attraction. It gives certified scuba participants the chance to explore around a substantial shipwreck rather than visiting only open reef sites. The wreck adds shape, scale, and a clear point of interest to the underwater route.

The available details do not specify the wreck’s depth, interior access, visibility, or the exact time spent there. That is worth noting because wreck conditions can affect what you see. You should follow the instructor’s briefing closely and treat the ship as an underwater site to explore from approved areas, not as a place to enter on your own.

The wreck route is especially appealing if you have already seen ordinary reef sites and want a different setting. It may also appeal to photographers, since the ship provides recognizable structures for underwater images. An optional underwater camera rental is available, with your photographs saved to an SD card for you to take home.

Do not book this trip solely on the assumption that the wreck is guaranteed. The plan can also use Koh Rang National Marine Park or other local sites. Ask about the expected route when you check availability if the HTMS Chang is the main reason you want to go.

Coral reefs and Koh Rang National Marine Park

Koh Rang is the alternative that leans toward reef scenery. The park is known for clear water and coral reefs, and the trip provides equipment for scuba, free-diving, and snorkeling. The setting should work well for people who want to look down from the surface, make repeated descents, or spend time exploring with a tank.

The park fee is separate from the tour price. Budget THB 200 per person in cash, and do not assume it is covered by the $107 booking price. This is the only listed admission charge, but it is important because cash is specifically required.

The exact sites within the park are not specified. That means the day can respond to the planned route and local conditions, but you should not expect a promised list of named reefs. The attraction here is the broader combination of clear water and coral areas, not a guarantee of one particular formation.

If you are traveling with children or friends who have different water interests, Koh Rang may be a good shared outing. The same boat supports several ways to enjoy the sites. Still, every participant should be comfortable with the activity they choose, and scuba participants must bring proof of certification.

Small groups and the safety briefing

Groups are limited to four participants, one of the strongest practical features of this trip. A small group can make it easier to hear the briefing, ask questions, and stay with your instructor. It also reduces the chance that you feel lost in a large group moving through the water.

Before entering the water, you receive a full briefing. The professional guide explains the plan and safety points for the activity you choose. The instructors speak English, Thai, Cambodian, French, Dutch, Chinese, and German, giving international groups a useful range of language options.

The experience provider is BB Divers. One named instructor connected with the trip is Ale, who is described as especially attentive and professional while working with a family group. If you want to request a particular instructor, you can ask when booking, though the available information does not promise that Ale will lead every departure.

Certified scuba participants should bring their diving certification and dive log. Those documents are specifically required, so do not leave them at your hotel. Full scuba equipment is supplied, along with snorkeling equipment, but personal certification paperwork is not something the operator can provide for you.

Equipment for scuba, free-diving, and snorkeling

The tour includes use of all scuba equipment and separate snorkeling equipment. That lowers the cost and effort of joining, especially if you are visiting Thailand without your own mask, fins, or tank equipment.

Free-divers can also take part, and PADI scuba and free-diving courses are available onboard. The course option makes the trip more flexible for mixed-experience groups, though the information provided does not specify course length, price, or certification schedule. Ask for those details before booking if instruction is your main goal.

The equipment inclusion does not mean every personal comfort item is supplied. The listed inclusions cover scuba gear, snorkeling gear, food, drinks, transfers from the west coast, and professional guidance. You should bring the required certification and log, and plan your personal day at sea around the items you normally need.

An optional underwater camera rental adds a nice extra for anyone who wants a record of the wreck or reef. Your images are saved to an SD card, so you can take them home rather than relying on a phone connection at sea.

Is $107 a fair price?

At $107 per person, this is not the cheapest way to spend a day around Koh Chang, but the value is strong if you will use the included services. You are paying for a full-day boat outing, hotel pickup on the west coast, an instructor, scuba equipment, snorkeling equipment, lunch, fruit, and drinks.

The price works best for certified scuba users who plan to make full use of the boat and gear. Renting equipment separately and arranging transport could narrow the difference between this trip and a lower-priced option. The small group limit also adds practical value, particularly if you want personal attention rather than a large group operation.

For snorkelers, the calculation is more personal. You receive transport, food, drinks, equipment, and access to the same marine sites, but you may spend less time actively using the service than a scuba participant. A boat joiner can still enjoy the ride and deck, though the cost may feel high if you mainly want to sunbathe.

Remember the possible THB 200 cash charge for Koh Rang. The park fee is modest compared with the total cost, but it should be part of your budget. West-coast pickup is included, while east-coast transfers are not, so your hotel location can affect the real price.

Who should book this Koh Chang trip?

I would choose this tour if you want a full day on the water and prefer having the practical pieces arranged in one booking. It suits certified scuba users, snorkelers, and free-divers who want to share a boat with family or friends doing different activities.

It is also a good fit for people who value instruction and supervision. The four-person limit is more appealing than a crowded boat if you want room to ask questions or need a guide to keep close track of the group.

Families and mixed groups should look closely at the activity setup. Everyone can choose scuba, snorkeling, or free-diving, and courses are available onboard. The named instructor Ale has experience working attentively with a family group, though no instructor is guaranteed for every departure.

I would hesitate if your entire plan depends on the HTMS Chang wreck. The wreck is a major highlight, but the route may instead use local reef sites or Koh Rang National Marine Park. I would also think twice if you are staying on the east coast and do not want to arrange your own way to the pickup area.

The activity is not suitable for pregnant women. It is marked as wheelchair accessible, but the information does not explain which parts of the boat or water activities are accessible, so ask the operator for details if that affects your booking.

Booking details worth checking before you go

You can cancel up to 24 hours before the activity for a full refund, and the reserve-now, pay-later option lets you hold a place without paying immediately. Those terms help if your Koh Chang schedule is still moving around.

Starting times are shown with availability, so check them rather than assuming one fixed departure hour. Hotel pickup is from the reception of west-coast hotels, and you should confirm that your accommodation falls within the included area.

Bring your scuba certification and dive log if you plan to use a tank. If you are relying on the national park route, carry THB 200 in cash for the entrance fee.

Should you book it?

Book this trip if you want an organized full-day outing with strong practical inclusions, small groups, and several ways to enjoy the water. The HTMS Chang gives the local route a memorable focus, while Koh Rang offers clear water and coral reef scenery.

Skip it if you need a guaranteed wreck visit, dislike spending a full day on a boat, or are staying on the east coast and do not want to arrange transport. For most certified scuba users, the $107 price is reasonable because it combines gear, food, drinks, instruction, and transfers. The small group size is the best reason to choose it over a bare-bones boat trip.

FAQ

What is included in the Koh Chang underwater trip?

The price includes roundtrip hotel transfers from west-coast hotels, lunch, fresh fruit, water, coffee, tea, soft drinks, scuba equipment, snorkeling equipment, and a professional guide.

Is hotel pickup included?

Yes. Pickup is included from the reception of hotels on Koh Chang’s west coast. Transfers from east-coast hotels are not included.

Will the boat visit the HTMS Chang wreck?

The trip may visit the HTMS Chang wreck and other local sites. On some days, the boat instead goes to Koh Rang National Marine Park, so the wreck is not guaranteed.

Is the Koh Rang National Marine Park fee included?

No. The park entry fee is THB 200 per person and must be paid in cash.

Can snorkelers and scuba participants join the same trip?

Yes. The boat supports scuba, snorkeling, and free-diving, so people in the same group can choose different activities.

How large is the group?

The activity is limited to four participants.

What should certified scuba participants bring?

Bring your diving certification and dive log.

Can I cancel the booking?

Yes. You can cancel up to 24 hours in advance for a full refund. You can also reserve now and pay later.