Dive the scale of HTMS Chang—not just its name.
The former landing ship is roughly 100 metres long and sits upright to around 30 metres. Its size, depth and marine life create several possible dives, but it is not automatically suitable for every certified diver.
One wreck, several ways to experience it.
The scale
The bow, deck structure and long hull make the wreck feel substantial even before you focus on individual details.
The marine life
Schools of barracuda, trevally and batfish may move around the structure, with groupers, lionfish and smaller life on the wreck.
The depth range
A dive can focus on the upper structure or include deeper sections when certification, gas and conditions support that plan.
Certification is the start of the decision—not the end.
The useful question is whether you can hold depth, position and awareness comfortably around a large structure in the conditions of the day.
A short history worth knowing before the descent.
The ship began as USS Lincoln County, an American tank landing ship built during the Second World War. It later served with the Royal Thai Navy as HTMS Chang.
After decommissioning, the vessel was prepared and intentionally sunk near Koh Chang in 2012. It has since developed into a large artificial reef and one of the area’s most recognisable dive sites.
Knowing the broad history adds context, but the modern dive is shaped most by the wreck’s size, depth, marine growth and the water conditions of that particular day.
Four decisions before entering the water.
Confirm the level
Match certification and recent depth experience to the intended route.
Review conditions
Visibility and current affect orientation, gas planning and how ambitious the route should be.
Define the boundary
Know whether this is an exterior tour, a limited swim-through or trained penetration.
Keep an alternative
If conditions do not support the wreck, a good reef dive is better than forcing the original plan.
Before asking for HTMS Chang.
Can an Open Water diver dive HTMS Chang?
The upper wreck can be shallower than the seabed, but depth limits, conditions and the intended route matter. Ask for a fit check rather than assuming the site is suitable from the card alone.
Do I need a wreck specialty?
You do not need penetration training merely to view the exterior within your certification limits. Any overhead penetration requires appropriate training, equipment and planning.
Is nitrox useful?
It can be useful on some profiles, but the actual mix must suit the planned maximum depth and you need the appropriate certification.
Is the wreck available every day?
Do not assume so. Boat schedules, group composition, conditions and safety decisions determine the day’s route.
Share your certification, last dive and depth experience.
I can help you understand whether HTMS Chang is a realistic highlight for your date—or whether another dive first would make it better.
