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Advanced Wreck in Koh Chang: 2 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say.
TecDiveTools lists 2 dive centres teaching Advanced Wreck 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.
About the course
Technical wreck penetration course advancing beyond entry-level wreck diving. Teaches deep penetration technique, gas management for extended overhead environments, and navigation discipline inside wrecks where direct ascent is impossible. Requires 6 penetration dives with 100 minutes bottom time inside real wrecks, not just around them.
Minimum 6 wreck penetration dives with 100 minutes accumulated bottom time. In-water skills: line-following in zero visibility, navigation inside wreck structure, gas management for long overhead sections, emergency procedures with limited ascent options. Pre-dive planning for penetration depth limits and gas reserves.
The centres listed above teach TDI Advanced Wreck in Koh Chang, Thailand. Requirements are set by the agency, not the centre, so they are the same wherever you train — what differs is price, class size and how much diving is included.
2 dive centres on TecDiveTools teach TDI Advanced Wreck in Koh Chang, Thailand. Each is listed above.
The Gulf of Thailand's technical wrecks are offshore expeditions rather than day trips: HTMS Pangan (65 m) and the Tattori Maru (75 m) are reached from Koh Tao, and HTMS Sarasin (43 m) off Pattaya and PAK 1 (43 m) off Koh Chang are closer. The USS Lagarto submarine (70 m) is a war grave: no penetration, and diving it is subject to US Navy permission.