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 :


Read the rest of this entry »

Share on:Facebooktwittergoogle_plusredditpinterestlinkedintumblrmailFacebooktwittergoogle_plusredditpinterestlinkedintumblrmail

Tags: , , , , , , , , , , , , , , , ,

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.

Share on:Facebooktwittergoogle_plusredditpinterestlinkedintumblrmailFacebooktwittergoogle_plusredditpinterestlinkedintumblrmail

Tags: , , , , , , , , , , ,

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



Share on:Facebooktwittergoogle_plusredditpinterestlinkedintumblrmailFacebooktwittergoogle_plusredditpinterestlinkedintumblrmail

Tottori Maru Wreck

This is footage from 2012 when a team from Davy Jones Locker dived the Tottori Maru Wreck which is located in the southern area of the gulf of Siam.  The Tottori Maru was being used for transporting war supplies and was also a notorious “hell ship” which carried alllied POW’s. Fortunately none were on board when the ship was torpedoed by US submarine USS hammerhead.

The Totorri Maru wreck can be reached at 62 meters and it is 76 meters to the seabed.


Share on:Facebooktwittergoogle_plusredditpinterestlinkedintumblrmailFacebooktwittergoogle_plusredditpinterestlinkedintumblrmail

The Unicorn Wreck Koh Tao

Shipwrecks change, all shipwrecks are unstable, they are constantly being attacked by the environment and eventually get swallowed into the sand to be forgotten. No part of the wreck is unchanged over time, the shallower the wreck the more oxygenated the water and heavy sea states accellerate the decomposition making deciphering the story of the wreckage that littel bit more challenging.

diving the Unicorn wreck koh tao


Our local tech training wreck known as the Unicorn was an insurance scam according to the locals. It’s anchored 4 nautical miles off the northernmost part of Koh Tao and slowly slipped beneath the waves as the water rushed into the hold via the open seacock. The ship was insured for a cargo off tinned tuna but when the salvage team (Mermaid Marine) arrived they found only inexpensive dog food.


She sits at 48 meters to the sand listing to the port at 45 degrees with the starboard gunwale (the top edge of the side of a boat) at 45 meters. When diving this wreck we would normally tie into the mast at the top of the bridge or the top of the mast, both at 40 meters. The visibility on this wreck is normally around 4-5 meters, a good knowledge of this wreck is essential for good navigation so I was surprised to when diving a couple of days ago (16/1/16) to not find the mast on top of the bridge, just part of the base. Confused a little I searched a little longer but was only left with a reminder that nothing stays the same. eventually tieing in to the base and signalling our surface support that the shot (weight) was secure.


What removed the mast? Possibly a passing trawler or maybe a large dive boat? It’s very easy to forget a 20 tonne vessel exerts 20 tonnes of lift in a heavy sea state especially if the line securing the vessel isn’t let out sufficiently. The recommendation is 3 times the depth, that’s a lot of line when tied into 40 meters. Most companies in Thailand won’t won’t have that much line on board, 100 meters being the norm. The cause may never be found, another story to add to the history of the unicorn shipwreck.



Share on:Facebooktwittergoogle_plusredditpinterestlinkedintumblrmailFacebooktwittergoogle_plusredditpinterestlinkedintumblrmail