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HTMS Chang (Wreck) - Scuba Diving

The HTMS Chang is our favourite wreck in Koh Tao, a purpose-sunk former troop carrier that went down back in 2007. It’s big, lying upright on the seabed, running about 100 meters bow to stern. We like how the various decks and cargo holds offer plenty of swim-throughs, accessible for confident Open Water divers. Drop down to the main deck and you’ll often spot a few Blacktip Soldierfish tucked into the shadowed recesses. Below decks, the light filters in through various openings, casting shifting patterns on the corroded metal. Keep an eye out for Blennies peeking from small holes. The deeper parts, around 30 meters, often have Grey Sharpnose Sharks patrolling the perimeter, and we’ve seen the occasional Common Seahorse clinging to a railing, if you know where to look. We find the best time to dive the Chang is early morning before the crowds arrive, or late afternoon for that softer light. Currents can pick up, especially around the bow, so be prepared for a bit of a workout. It’s a dive that rewards multiple visits, each time revealing another corner or a new resident.