22/04/2019
This is what it is all about, pushing the boundaries and exploring new depths. Get in touch with DJL Tech on Koh Lipe to start your adventure into technical diving.
Whilst some dive sites are easily accessible, some are a little more elusive. This month a team of elite technical divers know as the S.E.A. South East Asia Explorers Club, set out on an expedition to explore some mystery ship wrecks in the Southern reaches of the Gulf of Thailand. With dive teams from several tech diving outfits across SEA including DJL TECH, Koh Tao Tec divers, Hydronauts, and The Dive Shop Cambodia.
Our targets, a set of GPS coordinates known as 'marks' thought to indicate the position of a second world war era shipwreck. These marks are acquired through a combination of painstaking scrunity of the war records, combined with the local knowledge of fishing boat captains, who keep a record of obstructions on the sea bed that could prove hazardous to thier expensive fishing nets.
The journey began with the logistical effort of transporting the massive amount of specialized equipment required to conduct this type of expedition to a remote fishing village in Southern Thailand's Songkhla province. The gear was loaded down the rickety pier on to the fishing boat we had chartered to be our home for the next 4 days.
At around 20 hours sailing time from the coast, we did not expect to make our main mark on the first day at sea. The decision was made to investigate some secondary marks en-route.
On the morning of our second day at sea, we had arrived at the target. We then set about the arduous task of 'shotting' the wreck. This involves dropping a weighted line to mark the ship wrecks position in the water. It could be described as being like trying to play darts in a 75m long wind tunnel, blindfolded! With the weights line and marker float carefully prepared, expedition leader Tim Lawrence, aided the captain to manoeuvre the boat, whilst monitoring the echo sounder readout for the tell tale return of the wreck. At the critical second, the shout was given to deploy the shot weight on windward side of the boat. The line payed out smoothly, and a little more investigation of the sounder indicated the shot had found its target.
At these depths normal air could prove fatal, due to the potential for oxygen toxicity and narcosis. The divers we using a special blend of oxygen, nitrogen and helium known as 'trimix'.
First team into the water were Mikko and Erik, Mikko opting to use the SF2 rebreather, with Erik using the JJ. These complex rebreather units recycle the divers breathing gas, scrubbing carbon dioxide from the exhaled breath and replacing with oxygen. Geared up and into the water, they completed thier final safety checks and descended the shot line.
At the bottom they were pleased to confirm the shipwreck, with the shot marker close to the sunken vessels bridge. The wreck is sitting upright on a sandy sea bed at 75m. The structure was surprising intact for wreck of its age. Upon finding the shot mark was correctly placed they deployed a lift bag along the line to signal the surface.
Upon seeing the signal bag, team two consisting of open circuit trimix divers Ed manager of DJL Tech, in Koh Lipe, Dennis, owner of The Dive Shop Cambodia and Koh Tao Tec divers instructor Klaus kitted up and prepared for thier decent. Passing Mikko and Erik, who were now well into thier decompression schedule. Divers at this depth are unable to ascend directly to the surface due to the build up of gasses in thier bodies, surfacing too soon puts them at risk of decompression sickness, also known as 'the bends', a potentially fatal condition caused by bubbles forming in thier tissues.
Teams 3 and 4 descended, Oliver and Mario both using the hammerhead rebreather, With expedition leader and DJL boss Tim using his heavily modified AP inspiration, and RAID regional manager Chris diving thd Holis Prism II.
Exploring the wreck itself, the divers looked for clues that could be used to positively identify the ship. Looking at the ships layout, and looking for artefacts that could be used in the process. They recovered a number of items including some glass bottles with Japanese writing and a porthole, which will be displayed in the DJL maritime history museum in Koh Tao. Tim is now in contact with the ship builders to see if the construction of the porthole can shed some light on the identity of the ship.
The wreck is believed to be either the Akita Maru or the Tiyaru Maru, both Japanese transport ships reported sunk in the area by Dutch submarine 019 on 10th January 1942.
After completing a number of dives on the wreck, and with all divers safely accounted for we sailed through thr night to return home.
If you are a technical diver looking to join a SEA expedition or a diver interested in getting trained to conduct this type of challenging diving, get in touch today.