techdivethailand

Wreck Diving Expedition, Tech Liveaboard, September 2008

Tech wreck  expedition with Davy Jones Locker [PADI 5* Gold Palm Resort] & Worldwide Dive &  Sail

Date: 7 - 13th September 2008

Destination: Southern Gulf of Thailand [departing from Koh Tao or Koh Samui]

Objective: WW2 Cargo Vessels

Depth Range: 40 - 70 metres [Trimix & CCR Rebreather supported]

Brief: Based on WW2 Allied submarine records combined with local knowledge, we’ve selected four targets in the Southern Gulf of Thailand. These range in size, up to 10,000 tonnes.

We’ve scheduled the trip to include 5 days of diving, planned for 2 dives per day. Depth will be in the 40 - 70 metre range, with low wave heights and good visibility expected at this time.

We’ll be diving from the Sampai Jumpa sailing liveaboard, supporting both open circuit [twin set with central isolation manifold] or ccr rebreather. Trimix and nitrox are available onboard.

The price is 50,000 baht per person OR 230,000 for the full charter, maximum 10 divers.

For inquiries please contact DJL Diving.

5 metre whale shark at the Chumphon Pinnacles diving site

This morning, divers from DJL Diving Koh Tao got to dive with a 5 metre long whale shark at the Chumphon Pinnacles.

On the boat to enjoy the experience was Christy, making the final two dives of her PADI Open Water course with DJL Instructor Alex. Also diving was Luke, with a group of certified divers.

Let’s hope the whale shark sticks around for a few days!

DJL Diving Team Identifies WW2 Japanese Minelayer HIJMS Hatsutaka

Davy Jones Locker [PADI 5* Gold Palm Resort, BSAC Centre of Excellence]

Written by Tim Lawrence, Gary Bain & Darius Moazzami 

Introduction Throughout the Second World War, the Gulf of Thailand and Malaysian peninsular was the scene for much naval conflict, with the loss of many military and cargo vessels. The relatively shallow depth throughout this region means through the application of deep technical diving techniques, we can explore the seabed, revisiting these lost ships and investigating history. During March 2008, a team of divers from Davy Jones Locker [Koh Tao, Thailand], organised an expedition to locate and identify a military vessel with a lot of history in this region - the Imperial Japanese Navy Minelayer Hatsutaka. Here are our findings.

Image: Mast on the forward section of the HIJMS Hatsutaka

Historical Perspective

The Japanese Minelayer HIJMS Hatsutaka was completed in October 1939. Built by Harima & Co. Hatsutaka gave it’s name to that class of ship. Measuring 90.9 metres in length with a 11.3 metre beam, the Hatsutaka class had a fast, sleek design displacing 1608 tonnes. Engineered with a dual shaft, three boiler power plant, 6000hp was delivered to the propellers giving the minelayer a maximum speed of 20 knots.

Image: WW2 Minelayer HIJMS Hatsutaka

The Hatsutaka class were dual purpose minelayers and net tenders.

With a capacity 360 mines, at the time of building HIJMS Hatsutaka was armed with four 40 mm guns plus a further four 25mm anti aircraft guns.

As WW2 progressed, American submarines become increasingly effective in disrupting Japanese shipping, reducing the transport of vital raw materials. In response, HIJMS Hatsutaka was modified and assigned the role of convoy escort, in an effort to restore the flow of aggregates for the Japanese war machine. Hatsutaka excelled in this new role. Fiercely defending Japanese marus throughout the Gulf of Thailand and Malaysian peninsular, Hatsutaka rapidly became the scourge of US Submarines in this area.

On May 3rd 1945, Japanese Naval records show that the Hatsutaka attacked a submarine in the southern Gulf of Thailand, dropping depth charges on the submerged vessel at 30 fathoms. It’s believed that this was the Baleo Class submarine USS Lagarto [SS-371]. All 86 men on the USS Largato were lost.

Commanding Officer of USS Lagarto, Commander Latta was a veteran of war, having previously made seven patrols as Commanding Officer of USS Narwhal II (SS-167). Every patrol made by this officer was designated successful for the award of combat insignia, a record surpassed by no commanding officer in the Submarine Force.

USS Hawkbill [SS-366] Commanding Officer, Lt. Comdr. F. W. Scanland, Jr. was a close friend of Commander Latta. Stationed in peninsular Malaysia, when the Lagarto was reported overdue, he swore to avenge the loss of his colleagues.

Image: Baleo class submarine USS Hawkbill, photographed in October 1945 [Courtesy of http://usshawkbill.com/366/]

This excerpt is from the Official History of the USS Hawkbill [http://usshawkbill.com/366/].

“Continued westward and at two o’clock in the morning, 16 May, commenced patrolling in shallow water seven miles off the Malay coast, just north of Pulo Tenggol, Malaya, scene of much of Hawkbill’s later actions.

Within two hours after arrival on station, and 2 hours before dawn, Hawkbill contacted an unidentified target running south along the coast. Within an hour after contact, after closing to get at the target before he could enter a mined area behind Pulo Tenggol, Hawkbill had fired six torpedoes from the forward nest for two hits. Range was 2600 yards. Target stopped and opened up with a barrage of four-inch and automatic weapons fire which lasted off and on until seven o’clock in the morning. The target was obviously hurt, but still afloat, and his gunfire held Hawkbill off during darkness.

Pulling clear until dawn, Hawkbill submerged and started back in, closing sufficiently to identify the target as a sleek, fast mine layer of the Hatsutaka Class. He was being towed slowly toward the beach, stern first., by a small sea truck of about 400 tons. At extreme range of 4650 yards, Hawkbill fired a second salvo of three torpedoes at this target. Sighting the wakes, Hatsutaka opened fire with everything he had in an effort to detonate the torpedoes. To no avail, however, for one broke him in two with a terrific explosion amidships.”

Davy Jones Locker Dive Expedition: March 28th 2008, Eastern Peninsular Malaysia

After researching war reports and cross referencing this data against local knowledge, we determined the likely location of HIJMS Hatsutaka. Malaysian fishermen were aware of a large wreck in their waters, and suggested it was from the correct period, but were unaware of the identity.

We believed the wreck would be situated several kilometers north of Dungun, to the north-west of Pulao Tenngol, approximately one kilometer off shore. This is a popular spot for the fishermen to drop fish traps, and for spear fishing.

With the logistical assistance of local Tenngol Island dive operator Lee Tong Theng ‘Charlie’, we chartered a fishing boat and headed to the wreck site, with the objective of locating and identifying the Hatsutaka. Scheduled during one of South East Asia’s inter-monsoon periods, the expedition was coordinated to coincide with the best possible diving conditions. A large river estuary flows into the sea at Dungun, but we would be diving sufficiently far north for visibility to remain unaffected.

Image: DJL Diving PADI Course Director Darius Moazzami prepares to dive

Arriving early morning with near zero wave heights, we ran a brief sonar survey, before deploying the shot line. Maximum depth in this area is relatively shallow at 35m, but the region does suffer strong north-south currents.

Image: Manolo tends to the depth sonar

We planned five waves of wreck dives throughout the day, breaking into teams of two divers so we could discuss the observations from each dive and maximize the effectiveness of our survey. Visibility was in the 10-15m range, with the current running strong in the morning then easing off later in the day.

On the first dive our shot line was secured to what we believe to be the forward section of the wreck. The ship is broken in two main portions, with the break situated amidships rear of the bridge.

The bow section is lying on it’s port side, measuring approximately 45m in length. This forward section lies on a roughly north-south orientation.

Image: Forward section of the WW2 Minelayer HIJMS Hatsutaka

The stern section of the wreck is sitting upright on the seabed, approximately 25m off the bow section, extending west, towards the mainland. The structure is still mostly solid, with portholes lining the hull. This is all consistent with the information given in the original war report, with Hatsutaka being towed stern first towards the mainland, and breaking in two.

In addition to the two main sections, there are other scattered areas of wreckage. Primarily attributable to the original torpedo attack, this is has also been contributed to by ‘dynamite fishing’ which was only made illegal and enforced by the marine police as recently as ten years ago.

The wreck is rich with WW2 artifacts. In the debris field beneath the bridge, we observed typical WW2 Japanese naval items.

Of particular interest was part of a pair of binoculars, which are characteristic of the superior optics used by the Japanese at this time.

Left image: Part of a set of binoculars, typical of Japanese optics used in WW2

Right Image: Gyroscopic compass and range finding device

This artifact is very similar to a set recovered from the Japanese Heavy Cruiser Haguro [sunk 55 miles south west of Penang, Malaysia]. 

Also fascinating, was a large gyroscopic ship’s compass and range finding instrument, fitted with intricate glass prisms and scales.

After cleaning the coral of the top piece of the range-finder, we found the following manufacturers plate:

Image: Makers plate on top of range-finding device

The translation of the Japanese script, comes out as follows:

 90 Compass Type 1
[Kou-Dai-Kyo] Big Mirror

Type KA5 No. 19973
Company Name
Tokyo Keiki Sei Sakujo [Tokyo measurement company]
Made December 1938

Given that the HIJMS Hatsutaka was completed in 1939, the date of the makers stamp on the compass fits well. 

Scattered across the wreck we saw several pressure sensitive mechanisms which we assume to be part of a depth charge triggering mechanism. These are stamped with Japanese script.

Image: Depth charge detonator device

On the stern section there are many unexploded shells.

We recovered an empty casing, which measured 25mm, again consistent with the technical details for HIJMS Hatsutaka.

Image: 25 mm casing, consitent with HIJMS Hatsutaka’s armament

We also observed what we assume to be an anti aircraft turret mounting, and believe the gun to has fallen off the mounting, into the wreckage.

After 63 years on the seabed, the wreck of HIJMS Hatsutaka is now rich with marine life. The ship is encrusted with colorful corals, with an enormous population of fusiliers and trevelly surrounding the wreck, a testament to nature’s ability to overcome adversity.

Diving the Hatsutaka was a fascinating experience, and we’ll soon return with another team of divers from Davy Jones Locker to further explore and map the wreck.

Image: The dive team from Davy Jones’ Locker: From left Gary Bain, Tim Lawrence, Tristan Termat, Bruno Silveira, Darius Moazzami & Manuel Santana Lopez.

We’d like to thank Lee Tong Theng ‘Charlie’ and Dick Clark [from the Official USS Hawkbill website] for their contributions in making this expedition a success.

Wreck Dive Expedition Opportunities with Davy Jones Locker

At Davy Jones’ Locker, Koh Tao Thailand, we’re committed to dive exploration, and will continue to seek out lost ship wrecks throughout South East Asia.

You too can get involved.

To encourage dive exploration, we’re offering an exciting new option for all our technical diver training with Davy Jones’ Locker.

If you enroll on either a DSAT Tec Deep or BSAC technical diving course with DJL, all the profit from your tech course will be put towards funding dive expeditions such as this. So as part of your tech diving course, you’ll get to take part in an exciting dive expedition.

For example, on this dive expedition Tristan Termat was completing his tech diving course - for his last two dives he joined our expedition team, re-locating and identifying the HIJMS Hatsutaka.  If you’re interested taking up the challenge, contact DJL Diving.

Image: Tech student Tristan and Tim prepare to enter the water

You can read full details of our technical diving courses on our website.

If you’re already certified as a technical diver [or are a group of technical divers], and want to get involved, again contact Davy Jones’ Locker, and we can discuss what’s possible.

There are many targets still waiting to be explored - we just need to commit the time and resources.

Workup dives survey small wreck South East of Koh Tao

After discovering a small wreck south east of Koh Tao Thailand a couple of months ago, this morning, a team of divers from DJL returned to the wreck to make a survey and get a better idea of the wreck.

Image 1: Calm sea looking out from Sairee Beach, Koh Tao

Image 2: Tim briefs Manolo, Arne & James on exactly how the diving and survey is to be conducted

She sits at 40 metres, so this provided perfect work-up dives for a bigger wreck diving expedition later this month….

The Gulf of Thailand is completely flat at the moment - prime time for taking the RIB out, so we were able to reach the wreck dive site in less than 30 minutes. During our discovery dives on the wreck at the start of the year, visibility was less than one meter, in the ‘muddy’ channel between Koh Tao and Koh Phangan. We hoped for better today!

Unfortunately, that wasn’t the case! Again we were treated to about 2-3 metres vis at depth, but were still able to build up a better image of the dive site.

This isn’t a ’serious wreck dive‘ - it’s a steel barge around 25 metres in length with a beam of about 3.5 metres. The top is at about 39 metres, and it looks to have been down for some time as there are lots of nets and corals covering the wreck.

Images; Underwater photos of the wreck [in poor visibility]

Probably the most eventful moment was a jenkins ray coming out of the murk to scare Tim!

Image: Tim & Manolo on the DJL RIB

Anyway, all good practice! More to follow later this month . . . . . Thanks to Manny for the images

James completes his IDC to qualify as a PADI Diving Instructor

Working as a professional Dive Instructor can be one of the most rewarding and challenging jobs a person can have. In addition to the inherent joys of introducing others to an environment with so many hidden wonders,  today’s dive instructors find themselves in an ever-expanding and diversifying market with new opportunities arising almost daily.

Image: New PADI Dive Instructor James Wynn

Following the completion of his scuba diving internship here on Koh Tao Thailand, we’re happy to announce that James Wynn [UK] has qualified as a PADI Open Water Scuba Instructor.

After passing the PADI Instructor examination, James is now able to teach all PADI dive courses up to and including Divemaster level.

James is now going to reward himself with a bit of tech and wreck diving, before returning back to the UK early next month.

If you’re interested in training to become a scuba diving instructor, checkout our instructor developement course [IDC] package.

Congratulations James!

Images of Whale Shark at the Chumphon Pinnacles Ko Tao

Following up on the previous whale shark story, BSAC divers Jane & Nigel from sunny Norfolk have kindly sent us images from their whale shark sighting at the Chumphon Pinnacles, Koh Tao.

Image: Whale shark at the Chumphon Pinnacles, photographed by Jane and Nigel

Using their digital underwater camera, they guys also got a good snap of one of the bull/grey reef ? sharks at the dive site.

Image: The guys after they returned from their afternoon of shark diving!

If you’re a certified diver and are planning on diving in koh tao, it really is worth checking out our late afternoon RIB diving trips. The benefits of getting out to the dive site by yourselves are massive!

For just a couple of hundred baht extra you’ll dive in a very small group, and get real primo dive experiences.

Whale Shark encounter diving at the Chumphon Pinnacles

When we head out for our late afternoon dives on the RIB, being the only boat at the dive site we expect surrounded by sharks, but yesterday afternoon we got a special treat at the Chumphon Pinnacles. Descending down the buoy line, the guys got to see a whale shark hanging around the pinnacle.

Certified divers Nigel & Jane, Morten, Rolf & Paul, got to enjoy a great dive as we were the only boat on the dive site, surrounded by sharks [which were even breaching the surface].

Whilst the divers were underwater, conditions deteriorated, with wave height increasing. Tim decided that rather than double diving the Chumphon Pinnacles as we usually would, we’d make the second dive at White Rock, which is much more sheltered. Even at White Rock, the guys got to see a hawksbill turtle.

The benefits of making the effort to get to Koh Tao dive sites when there are no other divers are massive. If you are a certified diver visiting Koh Tao, and want to check out our RIB diving, contact us and we’ll draw up a schedule to suit you.

4 PADI Divemasters graduate from DJL Diving Internship

After completing their Divemaster Trainee internship here on Koh Tao, Luke, James, Christian & Ceilidh have qualified as PADI Divemasters.

Image: From left, the new PADI Divemasters - James Wynn [UK], Christian Leach [Australia], Ceilidh Speir [Canada] & Luke White [UK]

To celebrate their achievement, the guys took part in the Koh Tao ritual snorkel test - drinking a cocktail through a mask and snorkel.

Image: The snorkel test @ Lotus Bar, Koh Tao Thailand

James is now continuing through to PADI Instructor, taking his Instructor Development Course [IDC]. Luke and Ceilidh are staying on Koh Tao, planning to work as PADI Divemasters, and Christian is returning home.

Image: Luke, Christian & James in Choppers Bar

Congratulations to all, and we hope they all continue to have plenty more diving adventures!

Tim certifies two new BSAC technical divers

Congratulations to Franky & Clare who have recently qualified as technical divers with DJL Diving.

Both came from Koh Tao Dive professional backgrounds. Clare did her PADI Divemaster training with Island Dive Club, before working as a freelance Divemaster for several dive shops. Franky has been teaching as a PADI Open Water Scuba Instructor with Coral Grand Divers at the north end of Sairee Beach.

Under Tim’s tuition, both Franky and Clare took the BSAC Advanced Nitrox course, Franky then going on to also complete his BSAC Extended Range Diver Training.

The course concluded with a days deep decompression diving visiting the WW2 Japanese Schooner and Unicorn ship wrecks north of Koh Tao, Thailand.

Franky will be joining us on our tech diving liveaboard to the South China Sea this May - we hope that Clare also continues to exersise her technical diving skills.

If you’re interested in finding out what’s involved in deep technical diver training, contact DJL Diving or visit the tech diving section on our website.

DJL Diving qualifies as PADI Gold Palm Resort

We’re happy to anounce that DJL Diving has been upgraded to become a PADI Gold Palm Resort [from our previous status of PADI Dive Resort].

The higher status is a result of the effort we’ve put into maintaining safe, quality PADI Diver training plus a range of exciting diving options.

In the words of PADI ‘The PIRA Gold Palm Resort membership classification is awarded to progressive PIRA Members that excel in providing quality services to traveling divers. A PIRA Gold Palm Resort presents a professional image and actively promotes the benefits of recreational scuba diving and snorkeling, dive travel and environmental awareness. A Gold Palm Resort’s appearance and performance compares favorably with quality resort dive operators in the local area and exceeds the local norm for dive resort standards.

With the opening of our new pool / bar / restaurant expected within the next month, we’re hoping to have another great year in 2008.

You can see our new PADI Gold Palm Resort status displayed on the PADI Website by searching through the ‘Find your PADI Dive Center’ feature.