The Torpedo Wreck, Koh Tao Wreck Exploration

The Torpedo Wreck, Koh Tao Tech ExplorationRecently the guys from the DJL Tech Department teamed up with Roctopus Tech and Koh Tao Tech Divers. The mission was to set off from Koh Tao and explore the Torpedo Wreck. DJL Tech Instructor Ed has written an account of the journey to the wreck for SEA Explorers Club.

The Torpedo Wreck

At DJL Tech we are always keeping a keen eye on the weather. Waiting for a good opportunity to dive the more interesting wrecks in the area. Eventually we spot that a calm period is coming and the message goes out to Koh Taos’ community of technical divers. Soon we would have an opportunity to dive the Torpedo Wreck. On the trip were divers from Koh Tao Tec Divers and Roctopus Tech, as well as a team from DJL Tech.

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New Shipwreck Located

New Shipwreck LocatedThe Davy Jones Locker Tec team has found a new shipwreck located North of Koh Tao. DJL owner Tim Lawrence who headed the dive team has taken time out to give us his first impressions of the dive and the wreck that was discovered.


“When I became a tech diving instructor it was my dream to find a shipwreck nobody else had dived. The thought of swimming around a shipwreck looking at subjects nobody else had seen since the loss, unravelling the story of the sinking and the human story was thrilling to me.



new shipwreck locatedIt felt that unlocking the story of the loss was like decoding the human history of the sea. That feeling has stayed with me and to this day remains the motivating force behind my wreck expeditions. It was with this thought on the 9th May 2016 that we set out to look for a new mark. The idea was after diving the HTMS Pangan we would look at a mark I had been given by a fisherman some 10 years earlier. The wreck had eluded us on previous visits as the seconds were off on the original mark but after speaking to my captain and him contacting his friends we had a new mark close to the old one so off we went.

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CCR Diving Song Hong

CCR Cave Diving Song HongBeing an open circuit cave diver and enjoying the challenge of the deep caves of Thailand I have for a long time wondered about the benefits of closed circuit rebreather technology in relation to caves. As CCR divers will tell you the units work best in a classic diving profile (max depth work shallower) and when a diving colleague Bruce Konefe took me on a course, ANDI CCR cave, I was intrigued to learn about the gas management rules for cave profiles as caves tend to follow their own profile without regard for the divers.


The cave where we were to complete our training, Song Hong, is a huge sink hole slap bang in the middle of Thailand. Song Hong is well known with local cave divers and stands out for its’ enormous size and depth with exceptionally clear water below the hydrogen sulphide layer. Part of the sink hole which allows for direct access to the surface is used by technical divers wishing to complete wishing to complete deep trimix diver training, avoiding the problems associated with currents and elevating respiration in the sea.



ccr cave diving song hongAs any rebreather diver will tell you you, rebreathers, due to the design do not lend themselves to achieving good trim, a skill that is essential for cave diving. A lot of time was spent moving weights and adjusting the height of the wing to counter the lift at the shoulders caused by the counter lung. The rebreathers I had with me, Evolution and Inspiration, due to the box they are protected by make it hard to move weights and tanks, to assist in this and I found it easier to remove the can and head and put them in a customized box. This has helped a lot and now it isn’t so much effort to maintain a horizontal position acceptable for cave diving.



Thankfully the gas management rules were a lot easier to CCR diving song hongmaster although I was surprised to see many applications of this. It depends on the amount of divers in a team and the amount of confidence in the individual team members, running from the bare minimum, carried around team members with a variation calculated at the largest RMV of this with a third reserve on top again. This is shared around the team to the old third in third out thirds developed by Sheck Exley with each team member carrying their own reserve. It can be quite unsettling when at depth and on the way in to a cave if you start to have doubts about your buddy’s ability to keep his shit together when the said shit hits the fan and you’re relying on your buddy to carry part of the emergency gas you need to get to the surface! At this point you begin to choose your buddies more carefully bearing in mind it’s the team gas rule that that has helped cave divers push back the curtain and explore deeper and longer cave systems.



CCR cave diving song hongOverall though CCRs greatly enhance the divers ability to explore caves and with careful adherence to the gas rules (whichever one you adopt) and choosing your your buddies with as much attention to detail there is no doubt CCRs take cave diving to another level. Happily, I had good diving buddies and the shared enjoyment of achieving a goal of completing the 60 metre circuit added to the pleasure.

Song Hong CCR Cave diving 2016 from bike09 on Vimeo.

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Davy Jones Locker technical diving courses and recruitment, May 2016

Davy Jones Locker technical diving courses and recruitment, May 2016Davy Jones Locker Koh Tao is expanding its’ Technical Diving Department in 2016. We will be holding a Tec diving camp and conducting a series of IANTD Tech courses between 11th May 2016 and 23rd May 2016, our aim is to offer employment to a number of suitable candidates who gain certification.  You do not need to be an IANTD  Instructor to take part in any of the courses that are offered, however there are certain prerequisites  which are listed below each course.


The Instructor for these courses will be the well respected Rasmus Dysted.


Rasmus has been a Diving Instructor since 1994 & started technical and cave diving in 1996. He has logged over 5000 dives in most parts of the world. Rasmus has written several course programs & materials, is an Instructor Trainer in 4 different training organisations and is also training military special ops. He is specialized in sidemount, CCR cave and trimix and is an Instructor on more than 10 different rebreathers.  His wide range of IANTD certifications make him the ideal candidate to teach the courses we will be offering.


Davy Jones Locker technical diving courses and recruitment, May 2016In order to give everyone attending  the opportunity to sign up to become an Advanced Recreational Trimix Instructor the schedule will start with the Normoxic courses first.





The planned Tech courses are as follows :


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Locating the HTMS Phangan wreck

HTMS Phangan


The HTMS Phangan was located 60 nautical miles from Koh Tao. She lies in 60 meters of clear water and you can reach the top of the wreck at 48 meters. Although The HTMS Phangan was a Royal Thai Navy vessel she was sunk in a storm, not in battle, with no loss of life.




HTMS Phangan chimney stack


She was located by Tim Lawrence​ from Davy Jones​ Locker and Jamie McCloud and his team of divers from the Trident boat. It was a great find as the wreck can be reached within 6 hours from Koh Tao and can be used for finishing off tech courses. If you are interested in future expeditions that Davy Jones Locker will be undertaking or would like more information about tech course please send us a message via our contact page



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