Freedive from Koh Chang to explore the HTMS Chang wreck and Koh Rang’s protected reefs. This full-day boat trip mixes freediving, snorkeling and comfortable boat support with lunch and equipment included.
Freedive from Koh Chang to explore the HTMS Chang wreck and Koh Rang’s protected reefs. This full-day boat trip mixes freediving, snorkeling and comfortable boat support with lunch and equipment included.
You step onto the roomy dayboat at first light, salt air cutting through the humid heat as the engine murmurs and the mainland slips away. The captain plots a route between the shallow fringing reefs around Koh Rang National Park and the deeper drop that holds the HTMS Chang wreck, and soon the water below is a patchwork of turquoise, navy and living reef.
Verified experiences and guided adventures in the surrounding area.
Operated by bbdivers · Koh Chang, Trat Province
You step onto the roomy dayboat at first light, salt air cutting through the humid heat as the engine murmurs and the mainland slips away. The captain plots a route between the shallow fringing reefs around Koh Rang National Park and the deeper drop that holds the HTMS Chang wreck, and soon the water below is a patchwork of turquoise, navy and living reef.
Koh Chang sits in the Gulf of Thailand and is part of a protected archipelago where coral growth and white-sand beaches meet fishing villages such as Bang Bao. The seabed here alternates between rocky bommies, sandy channels and coral gardens; strong outcrops create currents that both nourish plankton and draw larger fish. The HTMS Chang wreck has become an artificial reef and a reliably interesting freedive site, while sites around Koh Rang host compact coral bommies and clear shallows suitable for long breath-holds.
On a typical daytrip you’ll get a safety briefing, freedive with a buddy (guides available if booked singly), and float between snorkeling groups and scuba divers with a support boat nearby. Boats supply lunch, water and basic freedive equipment, but personal fit matters: a well-fitting mask and long fins make small differences in energy use.
Practical tips: schedule trips in the calmer season (Dec–Mar), plan for 6–8 hours on the water, use reef-safe sunscreen, and hydrate well before boarding. Expect variable visibility and occasional currents — this is freediving that rewards relaxed technique and respect for the marine environment.
No formal certification is required to join, but you must dive with a buddy; if alone you can choose the guided freedive option.
Basic freedive equipment is available on board, but personal masks and fins for correct fit are recommended; weight systems vary by provider.
Bring medication or acupressure bands—sit forward on the boat, focus on the horizon, and tell staff early so they can assist.
The wreck area includes deeper sections; many nearby sites are shallow and ideal for skilled beginners with a buddy or a guided freedive session.
bbdivers operates guided outdoor trips and adventures with an emphasis on safety, stewardship, and memorable experiences.




You step onto the roomy dayboat at first light, salt air cutting through the humid heat as the engine murmurs and the mainland slips away. The captain plots a route between the shallow fringing reefs around Koh Rang National Park and the deeper drop that holds the HTMS Chang wreck, and soon the water below is a patchwork of turquoise, navy and living reef.
You step onto the roomy dayboat at first light, salt air cutting through the humid heat as the engine murmurs and the mainland slips away. The captain plots a route between the shallow fringing reefs around Koh Rang National Park and the deeper drop that holds the HTMS Chang wreck, and soon the water below is a patchwork of turquoise, navy and living reef.
Koh Chang sits in the Gulf of Thailand and is part of a protected archipelago where coral growth and white-sand beaches meet fishing villages such as Bang Bao. The seabed here alternates between rocky bommies, sandy channels and coral gardens; strong outcrops create currents that both nourish plankton and draw larger fish. The HTMS Chang wreck has become an artificial reef and a reliably interesting freedive site, while sites around Koh Rang host compact coral bommies and clear shallows suitable for long breath-holds.
On a typical daytrip you’ll get a safety briefing, freedive with a buddy (guides available if booked singly), and float between snorkeling groups and scuba divers with a support boat nearby. Boats supply lunch, water and basic freedive equipment, but personal fit matters: a well-fitting mask and long fins make small differences in energy use.
Practical tips: schedule trips in the calmer season (Dec–Mar), plan for 6–8 hours on the water, use reef-safe sunscreen, and hydrate well before boarding. Expect variable visibility and occasional currents — this is freediving that rewards relaxed technique and respect for the marine environment.