#### How to Judge Your Diving Ascent Rate Without a Dive Computer

How to Judge Your Ascent Rate Without a Dive Computer by Andy Davis Novice divers often express frustration about how to best conduct safe and controlled ascents from their scuba dives. In particular, I see many new divers questioning the best technique for judging their ascent speed.  The common use of dive computers has automated […]

#### Choosing a Buoyancy Control Device BCD

Choosing Your Buoyancy Control Device (BCD) by Andy Davis Shopping for a scuba buoyancy control device (BCD) is like completing a jigsaw.  There is a huge variety of products and options available for the diver to chose from. The diver needs certain functions, but may also want certain additional functionality.  Manufacturers/retailers will always try and make divers want […]

#### Scuba Cylinder Specifications | Metric & Imperial

Scuba Cylinder Specifications for Buoyancy and Weighting Calculations When scuba divers calculate their buoyancy with an aluminum cylinder,  it is essential for them to know the relative buoyancy characteristics of their chosen cylinder – at full pressure capacity and also at their minimum reserve (500psi). The following tables provide buoyancy information on the common Luxfer […]

#### Scuba Q and A: Drysuit or BCD for Primary Buoyancy?

Scuba Q and A QUESTION: I need some advice; I have been told to use your BCD for buoyancy control instead of your dry suit. I have also been told the opposite.  Which option is best, or does it really matter? Andy’s Answer: PADI teaches drysuit primary buoyancy on their recreational specialty. Then at tech level, […]

#### 99 Problems….and your TRIM is one!

99 Problems….and your TRIM is one! by Andy Davis. The short article outlines the most common trim problems experienced by scuba divers and how to overcome them. In scuba diving, our trim is the position and angle of our body in the water.  Ideally, that trim should be in flat and horizontal.  This is a […]

#### The Secret To Improving Your Air Consumption For Scuba Diving

The Secret To Improving Your Air Consumption  by Andy Davis I encounter many novice divers who are dissatisfied, even frustrated, by their air consumption whilst scuba diving.  High air consumption is often the controlling limit on dive time for novice-intermediate level divers. It really sucks to head to the surface because you’ve burned through your […]

#### Ten Pro Tips For A Better Horizontal Hover

Ten Tips to Attain a Better Horizontal Hover – Scuba Diving Techniques by Andy Davis Scuba diving techniques to improve your comfort and capability underwater. In this article, I list ten simple techniques that will allow you to develop a better horizontal hover whilst scuba diving. Get Your Weighting Right Fine-tune & confirm your max weighting […]

#### No.9 | Streamlined Scuba Equipment

Scuba Buoyancy Masterclass Series #1 STREAMLINED SCUBA EQUIPMENT by Andy Davis Streamlined scuba equipment is a critical factor in making overall improvements to your comfort and control in the water.  Scuba divers should consider streamlined scuba kit to be a high priority when purchasing and configuring their equipment for diving. This article explains the benefits […]

#### No.8 | The Balanced Rig

Scuba Buoyancy Masterclass Series #8 THE BALANCED RIG by Andy Davis When considering the configuration of their scuba equipment for precision buoyancy and weighting, scuba divers should pay heed to the safety issues arising from having non-ditchable weight.  To mitigate those potential problems, it is worthwhile to devote some attention to the principle of a […]

#### No.7 | Ascent, Descent & Bottom Phase

Scuba Buoyancy Masterclass #7 ASCENT, DESCENT & BOTTOM PHASE by Andy Davis Scuba buoyancy plays an important role in all the phases of a scuba dive. In this article, we look in detail at particular elements of a scuba dive, with an emphasis on the impact of scuba buoyancy control on the safety and enjoyment […]

#### No.6 | Scuba Buoyancy & Breathing

Scuba Buoyancy Masterclass #6 SCUBA BUOYANCY AND BREATHING by Andy Davis Breathing plays a critical role in scuba buoyancy control.  As we breath, the inflation and deflation of our lungs is continually affecting our buoyancy, but providing the breathing remains steady, slow and controlled it is rarely noticeable on a scuba dive. The Lungs are […]

#### No.5 | Precision Trim & Position Contol

Scuba Buoyancy Masterclass #5 PRECISION TRIM & POSITION CONTROL by Andy Davis Whenever we use our fins for propulsion in the water, we create directional thrust. If our body is not horizontally trimmed (‘flat’) in the water, then we will be accidentally directing that thrust at an angle (upwards or downwards) that will interfere with […]

#### No.4 | Perfect Scuba Weighting

Scuba Buoyancy Masterclass Series #4 PERFECT SCUBA WEIGHTING by Andy Davis Divers seeking perfected scuba buoyancy can achieve precise and correct weighting through the application of several assessment methods.  As the diver progresses in experience, whenever they change equipment or whenever they change diving environments (salt/fresh water) they should re-assess their weighting. During the initial […]

#### No.3 | Achieving Great Scuba Buoyancy Control

Scuba Buoyancy Masterclass ACHIEVING GREAT SCUBA BUOYANCY CONTROL by Andy Davis Scuba buoyancy control is determined by a number of different factors, such as breathing control, BCD/Drysuit inflation/deflation, weighting, trim and propulsion. As we know from our initial scuba training courses, our relative buoyancy underwater is dictated by whether the weight of water we displace […]

#### No.2 | Scuba Buoyancy Control Benefits

Scuba Buoyancy Masterclass Series #2 PRECISION BUOYANCY CONTROL BENEFITS by Andy Davis Let’s have a look at 7 specific reasons why effective scuba buoyancy control is critical to the scuba diver: Environmental Considerations Fragile marine life is easily damaged The underwater world is a fragile environment and unintended contact from a diver is going to […]

#### No.1 | Scuba Buoyancy Control for Divers

Scuba Buoyancy Masterclass Series #1 Scuba Buoyancy Control for Divers by Andy Davis Effective scuba buoyancy control is, without doubt, the most important attribute that a diver needs to develop. Control of your buoyancy has a direct impact on air consumption, comfort, relaxation and the control of descents and ascents – which have direct safety […]

#### Learning Scuba Diving Skills On Your Knees – Negative Habitual Response Conditioning

Learning Scuba Diving Skills On Your Knees Negative Habitual Response Conditioning by Andy Davis Sometimes small, seemingly insignificant or innocent training methods can have a persisting and insidious negative consequence for student divers. From my experience, teaching any diving skills from kneeling or in a vertical position simply reinforces a future habitual response to resume that ‘knees/feet […]

#### Kick-Start Your Diving Development in 2015 with Personalized Scuba Mentoring Workshops

Kick-Start Your Diving Development in 2015 with Personalized Scuba Mentoring Workshops  In addition to a wide range of specialized diving courses, I also offer personal scuba mentoring workshops that provide divers with access to expert coaching on scuba skills.  This coaching identifies and progresses the student’s goal to become an all-round better diver and/or develops […]