Andy Davisweighting - Andy Davis Technical Diving Blog

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

Originally posted 2018-11-05 06:10:26.  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 […]

#### Scuba Cylinder Specifications | Metric & Imperial

Originally posted 2018-03-07 23:54:33. 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 […]

#### Scuba Q and A: When To Drop Your Weight Belt?

Originally posted 2017-10-13 14:50:43. Scuba Q and A: Question:   On my Open Water course, I was taught to drop my weight belt in an emergency. What situations would merit dropping my weights? I am naturally concerned that dropping weights will lead to a rapid ascent to the surface.   Andy’s Answer: There is one primary […]

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

Originally posted 2018-03-07 23:57:10.  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 […]

#### Balanced Weighting For Scuba Divers

Originally posted 2018-03-07 23:56:48. Balanced Weighting For Scuba Divers The purpose of weighting for a scuba diver is to ensure that they can remain neutrally buoyant at all times in the water. The diver themselves is most buoyant in shallow water at the end of their dive; this is when they have the least exposure […]

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

Originally posted 2017-12-22 21:11:04. 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 […]

#### No.9 | Streamlined Scuba Equipment

Originally posted 2011-10-25 23:33:20. 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 […]

#### No.8 | The Balanced Rig

Originally posted 2011-08-30 17:36:52. 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 […]

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

Originally posted 2011-08-22 16:21:53. 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 […]

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

Originally posted 2011-08-05 00:36:32. 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 […]

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

Originally posted 2011-07-13 13:32:52. 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) […]

#### No.4 | Perfect Scuba Weighting

Originally posted 2011-07-01 14:53:51. 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 […]

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

Originally posted 2011-06-26 15:02:53. 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 […]

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

Originally posted 2011-06-25 13:46:58. 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 […]