Archive for ‘Special’

Air Consumption and Ways to Improve it.

By , 18 March, 2016, No Comment

Air consumption and ways to improve itInstructor Dani has written a new article for the DJL Blog offering some great tips on how make your air last longer when diving. It’s not only about what you do while you are in the water, other factors such as lifestyle and preparation before a dive are also important in helping you breathe underwater efficiently.


“Are you constantly finding you are turning your dives based on your air supply? fastest air consumption compared to your buddy’s on the boat? wanting to spend those extra few minutes with that turtle?

You may never have the best air consumption on the boat but you can have the most improved. Here are 10 helpful tips to help you to improve our air consumption and give you longer dives safely…


Ash Dykes, an Adventurer and Explorer

By , 8 March, 2016, No Comment

Interview with a past DJL Instructor and future hero!

Ash Dykes -Adventurer and ExplorerIt is a great achievement for all our of students who come to Davy Jones Locker and become certified divers, whether it’s completing an Open Water course or progressing through the Divemaster and Instructor internships. Sometimes you meet people like Ash Dykes, an Adventurer and Explorer who takes the level of adventure beyond what what most of us would even dream of.


Ash Dykes Davy Jones locker InstructorWhen Ash came to Davy Jones Locker to take his diving Internship he already had a history of setting himself challenges and consistently overcoming them. After completing his Divemaster and Instructor courses he worked at here at DJL before setting his sights on crossing entire countries unaided on foot. His first success was trekking across Mongolia and recently became the first person to traverse Madagascar. We caught up with Ash and managed to get a brief Q & A with him before he sets off again on his travels…


Deptherapy at Davy Jones Locker

By , 22 February, 2016, 1 Comment

Deptherapy at Davy Jones LockerDeptherapy is a UK Charity which helps members of the UK armed forces who have suffered serious injury. It runs SCUBA diving courses which are specially adapted to cater for injuries, benefits include a release from pain while diving and also a calming effect while under the water for those suffering from Post-traumatic stress disorder (PTSD).




Deptherapys’ Charitable Status is:

“The relief of people, especially wounded, current and ex-members of the UK Armed Services and their dependants  with a life-changing physical and/or mental condition or the like, by providing opportunities for rehabilitation, motivation and life-enrichment through specially tailored professionally delivered scuba diving”


Davy Jones Locker welcomed Deptherapy to come and dive with us and a great time was had by everyone, in and out of the water. In the video below Chris gives his thoughts about what it’s like to dive with Deptherapy. If you would like more information about Deptherapy and the services it provides you can visit the website here.




Davy Jones Locker technical diving courses and recruitment, May 2016

By , 1 February, 2016, No Comment

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:


Peak Performance Buoyancy

By , 14 September, 2015, 1 Comment
How often do we mention buoyancy in one day of diving? I think probably a lot! Buoyancy is probably the most important factor of being underwater, one of the main reasons is due to conservation of our reefs, some of the most amazing things to see underwater are also some of the smallest things, we want to get nice and close to view them however obviously we cannot touch! I’m sure everyone hears this before they dive… touching is a BIG no no in the diving world. Luckily using a few simple tricks of the trade we can learn to master our buoyancy so eventually it becomes easier for us to get nice and close to the underwater reefs.
There are many tricks, but pinpoint buoyancy control is the fundamental skill. Precise control of your buoyancy is what enables you to hover completely motionless, then back out of the area without using your hands at all. The real trick is to be completely correctly weighted and use your breathing to control your buoyancy. In fact, you’ll improve your buoyancy control by using your BC less, not more.

The six factors that affect your buoyancy are your ballast weight and your BC inflation, of course, and also your trim, your exposure suit buoyancy, your depth and your breath control. All these factors vary throughout a dive, the only two that remain the same are your trim and ballast weight. Some you can control, some you can’t. Buoyancy control isn’t as easy as it looks.

Lets go into some more detail about these six factors…

Ballast Weight

The ballast weight you carry doesn’t change during a dive, but it’s often the biggest problem. Many if not most divers are, carrying more lead than they need.

Most instructors during an open water course will overweight their students, it’s not a wrong thing to do, its very similar to a parent putting training wheels onto a kids bike when they are learning to ride it, only trouble is those training wheels need to be removed to progress on from the novice stage. This is a reason why the Advanced course is so advantageous to most open water students, you learn the basics of diving during your open water then during the advanced you get time with the instructor to really refine your diving.

The first step is to just do it–take off 1kg before your next dive. Can’t get below the surface? Before you reach for the lead again, make sure you really need it. Getting below the surface, especially on the first dive of the day, can be surprisingly difficult and can trick you into carrying more lead than you really need. Here are a few tips:

Be patient- especially when wearing a wet suit, it may take time to get that wetsuit fully soaked through.

Reach up. Hold the inflator hose over your head and stretch it upward a little so its attachment point to your BC is highest. This is the main problem students have when trying to deflate, if you don’t hold that inflator hose all the way up you will still have trapped air in your BCD.

Relax. Without realising you may still be kicking your legs and moving your arms, its just nerves, without realising you are kicking your way back to the surface.

Exhale.Exhale and hold it until you start sinking, holding a lung full of air is another manifestation of nerves, it also adds a lot of buoyancy and can be the difference between going down or not, exhale and take shallow intakes of breath until you are below 2 meters.

Force it. Last method, try to force your decent by generating some downwards thrust and kicking down.


Once you are correctly weighted the most important factor to consider is your trim. Trim is your positioning in the water, we want to be completely horizontal in the water, if you try to swim with your legs slightly lower than the rest of your body then whilst your trying to kick to go forwards you are also kicking yourself to the surface. this will cause any air in your BCD to expand so when you vent this you are also making yourself negatively buoyant. if you remain in perfect trim through your dive you wll end up fiddling with your BCD a lot less and conserving a lot more air. Perfect trim is what we aim for in diving and is also helped by the Peak Performance buoyancy speciality.

Tank weight

Tank weight is another thing to consider when diving, especially when using aluminium tanks, you will be considerably heavier at the beginning of a dive than towards the end of a dive, thankfully this change of weight is gradual, so the change wont come as a surprise and you can adjust for this buoyancy change gradually throughout the dive.

Exposure suit

There is no escaping the fact that wetsuits make you more buoyant, the tiny neoprene bubbles inside a wetsuit will cause gas to get trapped and the deeper you go the less buoyant your wetsuit will make you. The good news is once you have your buoyancy dialled in at a given depth the buoyancy wont change unless you change your depth. Many people in the tropics wont wear wetsuits to avoid this problem however in some circumstances wetsuits/dry suits are essential. practise makes perfect when using wetsuits, and the thicker the wetsuit the more buoyant it will make you.

Breath control

Breath control is the most important way to maintain good buoyancy, its the way you want to learn to eventually dive, as long as you remain neutrally buoyant with lungs half full you can exhale and sink and inhale and rise, this will gradually increase the effectiveness of your air usage, if you don’t need to waste air by inflating and deflating your BCD underwater and just use your lungs to control your buoyancy it will give you longer dives.

Putting it all together

Once you have mastered all of this you can start putting this together, the best thing to do is get diving, the more practice you have the more time you have to play with your buoyancy, the end result being that perfect photo or being able to be inches away from the reef without harming it in anyway, your instructor or dive master will applaud. The peak performance buoyancy speciality will be a massive step up to helping you along the way with achieving this.

by Dani