TDI Advanced Wreck Diving

From: ฿35,000.00 incl. VAT

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TDI Advanced Wreck Diving

Diving in an overhead environment is a completely different experience than any other form of technical diving. You are in enclosed spaces, with no direct access to the surface. In the TDI Advanced Wreck diver course, we teach you the proper techniques to enter and exit an overhead environment safely.

Welcome to the Wreck Diving Course at Chang Diving Center. We teach Advanced Wreck Diving at the biggest Wreck in the Gulf of Thailand! The HTMS CHANG.

Wreck Diving invites you to have a look at a part of the lesser-known underwater world. Where colours cease to exist, where daylight no longer exists, and nature has set aside a biological clock, specially made for the slow ticking world of overhead environments.

Technical Divers wishing to venture in historical overhead areas can follow us deeper into the depth, where time has stood still. Dive where only a few divers are able to and re-live life on board of a ship, venture into the bellows of the hull, engine rooms, passageways and passenger galleys.

Diving in and enclosed environments is not everybody’s cup of soup.
Chang Diving in Thailand Koh Chang offers training for overhead environments. With this course, you are taught how to safely dive these beautiful and dangerous diving locations.
Tech Divers have been fascinated with wreck diving for centuries. Salvage of gold or other cargo, but in recent years, more out of interest to answer questions about how and why the ship sank, what was on board?

Why Wreck Diving

Wreck Diving – A shipwreck is attractive to divers for several reasons:

  • It is an artificial reef, which creates a habitat for many types of marine life
  • It often is a large structure with many interesting parts and machinery, which is not normally closely observable on working,floating vessels
  • It often has an exciting or tragic history
  • It presents new skill challenges for scuba divers
  • It is part of the underwater cultural heritage and may be an important archaeological resource and aviation archaeology
  • It provides a first-hand insight into context for the loss, such as causal connections, geographical associations, trade patterns and many other areas, providing a microcosm of our maritime heritage and maritime history.


Wreck diving is split into three categories:

  • Non-penetration diving (i.e. swimming over the wreck)
  • Limited penetration diving, within the “light zone”
  • Full penetration diving, beyond the “light zone”

Each succeeding level involves greater risk, and will normally require greater levels of training, experience and equipment.

Non-penetration wreck diving is the least hazardous form of wreck diving, although divers still need to be aware of the entanglement risks presented by fishing nets and fishing lines which may be snagged to the wreck (wrecks are often popular fishing sites), and the underlying terrain may present a greater risk of sharp edges.

Penetration within the light zone presents greater hazards due to overhead and greater proximity of the wreck’s structure, but because of the proximity of a visible exit point, and some amount of external light, those hazards are more manageable. However, there is clearly a greater risk of entanglement and silt-out inside of the structure, as well as the requirement to move laterally to a defined exit point before one can surface in the event of an emergency.

Full penetration involves a great level of risks, including the risk of getting lost within the structure, the risk of complete darkness in the event of multiple light failures, and the inability to escape unassisted in the event of a disruption to air supply.

These categorization broadly coincide with the traditional division between “recreational” wreck diving (taught as a specialty course by recreational diver training agencies and normally limited to the “light zone” and/or 100-130 cumulative feet of depth plus penetration) and “technical” wreck diving (taught as a stand-alone course by technical diver training agencies).

All wrecks are in-between 14m to 42 meters and need more decompression training before engaging in dives on them. Inform yourself about the possibilities of combining courses with expeditions to these wrecks and check our schedule for future trips.

Every year we receive more and more inquiries from diver who want to go wreck diving since we can dive the HTMS Chang Wreck. At Chang Diving Center, we are not only fully equipped with rugged wreck diving equipment, but we also offer specialized courses as advanced wreck diving at the biggest Wreck in Thailand the HTMS Chang, T11 and we offer Special trips for the PAK 1 Wreck.


  • Primary and secondary regulators (for back gas or Sidemount set-up)
  • Two stage/decompression regulators
  • Mask + Back-up mask
  • BCD (wing) and harness or Sidemount Wing (with a min lift of 40 pounds)
  • Depth gauge/computer
  • Timing device and backup timing device
  • Appropriate exposure suit
  • Knife/cutting device and backup
  • Two inflatable signal tubes
  • Reel and spool
  • Slate and backup slate
  • Compass
  • Torch and Back-up torches (Wreck diving courses)
  • Hood – for Deep and Wreck Diving

More informations

Price Includes

  • Free transfer on your dive day from your hotel to the boat-White Sand Beach to Bang Bao.(East Coast pick up on request)
  • All Equipment which you need for Scuba Diving or Snorkeling
  • Full Set of own Scuba Diving Gear?Discount 200 THB/Day(we provide tanks and weights)
  • Lunch, soft drinks, coffee, tea and local fruits are served on boat
  • English Speaking Divemaster or Instructor (Group Sizes max.5 PAX)
  • Free Wifi on the Boat(max. 10PAX)
  • Credit Card At the Shop or Boat (PayPal only at the online store)Payments above 1500 THB Free of charge

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