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Technical diving in Koh Chang: 2 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say.
No dive centres here offer Self-Sufficient Diver, so that filter was removed.
TecDiveTools lists 2 dive centres teaching technical diving in Koh Chang, Thailand.
Listings are ordered by how much evidence exists about their technical diving, not by a star rating, with any paid Featured listing shown first and marked as such (how rankings work). 1 of these 2 carry reviews we have read and classified as being about technical or overhead training. The count excludes recreational certifications by name, so a busy resort does not outrank a one-instructor cave operation on the volume of its reef trips. Separately, 1 have at least one instructor whose reviews we have read and summarised — a dive centre carries no synthesis of its own. How we read and count reviews.
Looking for individual instructors instead? Instructors in Koh Chang.
TecDiveTools lists 2 dive centres teaching technical diving in Koh Chang, Thailand. The directory is not a census — it lists the centres we have been able to verify, and grows as more are added.
Thailand gives you the widest range of technical training in one country. Koh Tao, in the Gulf, is one of the world's busiest dive-training islands, with deep pinnacles nearby and offshore expeditions to 65–75 m wrecks. On the Andaman coast, Phuket is the base for deeper offshore sites and trips inland to cave sites. And the caves are genuinely demanding: the limestone caves of Khao Sok National Park, the deep sinkhole at Sra Keow near Krabi and Song Hong in Trang.
TDI (2), counted by how many of the 2 dive centres listed in Koh Chang, Thailand teach each. The agency sets the standards and issues the card; the centre sets the price and schedule.
Thailand's two coasts have opposite seasons. The Andaman coast (Phuket, Krabi, the Similan Islands) is best from roughly November to April, and the Similan Islands national park closes for the monsoon from mid-May to mid-October. The Gulf (Koh Tao, Koh Phangan) dives all year, with its wettest weather around November and December. Heavy rain can reduce visibility in the caves.
Around 27–30°C in the sea all year; a 3 mm wetsuit is usual, but long decompression still cools you, so many technical divers add an undersuit, a thicker wetsuit or a drysuit shell for multi-hour dives.