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Tech Diving







The Scuba Doctor is the leading source for equipment for advanced and technical divers. We have supplied thousands of experienced tech and rebreather divers worldwide with quality scuba diving equipment from the finest manufacturers.

Tech Tip:
Blame Normalisation of Deviance, Not "Complacency"

Every year experienced divers die in diving related avoidable accidents that should not have happened because the victim was "always so careful". One of the more common examples is a failure to analyse gas before diving, but there are many different types of avoidable accidents. The usual explanation put forward is a lapse in following their training, typically as a result of complacency. The victim is blamed for becoming complacent, the dive community is again reminded to be vigilant against complacency, and then another avoidable accident occurs. Perhaps a different way of explaining the cause of these predictable accidents could help effect a change in this unfortunate cycle.

The concept of Normalisation of Deviance has been used to describe the cause of NASA's flawed decisions that led to the Challenger space shuttle disaster. Normalisation of deviance from dive safety begins when the diver has a lapse in one or more safety protocols (often as a result of time and/or financial pressures) and nothing bad happens. The lapse reoccurs without incident and slowly the diver grows more accustomed to the deviant behaviour. Eventually the diver becomes so accustomed to a deviation from dive safety standards that they consider their unsafe behaviour to be acceptably normal. Ultimately one or more safety protocols are permanently deleted from their routine; enabling the diver have a serious, perhaps fatal, accident. To other divers, the accident is bewildering because the behaviour seems obviously unsafe and the victim had enough training and certainly enough experience to "know better".

It's clearly not productive to keep blaming the victim for these avoidable accidents. We can't solve this complex problem in a Tech Tip but a step to addressing this dive safety issue is to begin a discussion within the dive training community. Do we need a different educational approach that formally recognises and addresses normalisation of deviance as an underlying cause of many avoidable accidents among experienced divers? If you are an experienced diver, or dive professional, The Scuba Doctor urges you to raise awareness of this issue among your peers.

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Split Ring 38mm (1.5 inch) - Stainless Steel

Split Ring 38mm (1.5 inch) - Stainless Steel
$5.00  $4.00
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Shearwater Research NERD 2 Dive Computer - Stand Alone

Shearwater Research NERD 2 Dive Computer - Stand Alone
$2,300.00  $1,999.00
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Shearwater Research NERD 2 Dive Computer - Fischer

Shearwater Research NERD 2 Dive Computer - Fischer
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Shearwater Research Petrel 2 OC/CC SA Trimix Dive Computer

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Shearwater Research NERD 2 Dive Computer - DiveCAN

Shearwater Research NERD 2 Dive Computer - DiveCAN
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Cressi Master Ellipse T10-SC Regulator Set
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Suunto D6i Novo Zulu Watch Dive Computer w/USB and Transmitter
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Suunto D6i Novo Watch Dive Computer with USB Cable

Suunto D6i Novo Watch Dive Computer with USB Cable
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Suunto DX Watch Dive Computer - Silver Elastomer + Transmitter

Suunto DX Watch Dive Computer - Silver Elastomer + Transmitter
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IST Proline Mini Tank O-ring Kit with Brass Pick

IST Proline Mini Tank O-ring Kit with Brass Pick
$20.00  $15.00
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Suunto EON Steel Wrist Dive Computer w/USB and Tank Pod
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Monthly Specials For April

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Sonar Sea Master Dive Cord - 3mm (per metre)

Sonar Sea Master Dive Cord - 3mm (per metre)
$2.50  $2.00
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