is a small Ship Wreck located just away from Hin Raap South, Secret Reef and Blueberry Hill.
The T11 was used as a Coastal Partrol Ship, the T11 was a PGM Motor Gun Boat that was launched on the 14 September 1964 by the US Navy as PGM 71 and then on the 5 may 1965 it was transferred to the Thai Navy and named ต11,
The ship was then givin to koh Chang and sunk on 17 December 2013. It is a 30 meter long Gun Boat and resting at a depth of 16 meters. The ship is no longer in one complete piece it has been blown apart and broken in half, the T11 lays slightly to one side. The crows nest is now standing on the sandy bottom as asposed to where it should be(on the ship).
The T11 is a great dive site for a number of reasons, it can be used for a wreck speciality course and navigation courses or just for a fun dive. As already stated the ship is only 30 meters long so it makes it quite difficult to do a hole dive here so you have two options you can spend some time exploring the ship and take a heading and dive over to Hin Raab South or Secret Reef or even Blueberry Hill, just keep an eye out for a Compass wearing Trigger Fish on the way.
Your other choice is to take heading out to some concrete blocks that are not far away and some fun playing around band diving though the blocks to test your bounacy skills. On the T11 you have many Schools of Fish but not much corals but it is well worth diving and looking inside all the hatches and the broken apart ship.
Just keep an eye out there have been bamboo sharks here and again maybe you could see a black tip.